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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">As
filed with the Securities and Exchange Commission on August 25, 2017</FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Registration
No. ______</FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 12pt"><B>UNITED
STATES</B></FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 12pt"><B>SECURITIES
AND EXCHANGE COMMISSION</B></FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 12pt"><B>WASHINGTON,
D.C. 20549</B></FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>FORM
S-8</B></FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>REGISTRATION
STATEMENT</B></FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>UNDER
THE SECURITIES ACT OF 1933</B></FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>Aqua
Metals, Inc.</B></FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Exact
name of registrant as specified in its charter)</FONT></P>

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<TABLE CELLSPACING="0" CELLPADDING="0" ALIGN="CENTER" STYLE="width: 80%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Delaware</B></FONT></TD>
    <TD STYLE="width: 50%; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>47-1169572</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(State
or other jurisdiction of&nbsp;</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">incorporation
or organization)</FONT></P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(I.R.S.
Employer&nbsp;</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Identification
No.)&nbsp;</FONT></P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>
<TABLE CELLSPACING="0" CELLPADDING="0" ALIGN="CENTER" STYLE="width: 80%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="text-align: center; vertical-align: bottom">
    <TD STYLE="width: 50%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>1010
Atlantic Avenue</B>&nbsp;</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Alameda,
California</B></FONT></P></TD>
    <TD STYLE="width: 50%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>94501</B></FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Address
    of Principal Executive Offices)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Zip
    Code)</FONT></TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Officer
and Director Share Purchase Plan</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Full
title of the plan)</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</FONT><BR> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"></FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Mark
Weinswig</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Chief
Financial Officer</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Aqua
Metals, Inc.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>1010
Atlantic Avenue</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Alameda,
California 95401</B></FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Name
and address of agent for service)</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>(510)
479-7635</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Telephone
number, including area code, of agent for service)</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Indicate
by check mark whether the registrant is a large accelerated filter, an accelerated filer, a non-accelerated filer, or a smaller
reporting company. See the definitions of &ldquo;large accelerated filer,&rdquo; &ldquo;accelerated filer,&rdquo; &ldquo;smaller
reporting company,&rdquo; and &ldquo;emerging company&rdquo; in Rule 12b-2 of the Exchange Act.:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"></FONT></P>

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<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%; padding-left: 0.375in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Large accelerated filer &#9744;</FONT></TD>
    <TD STYLE="width: 50%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Accelerated filer&nbsp;&#9746;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-left: 0.375in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Non-accelerated filer&nbsp;&#9744;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Smaller reporting company&nbsp;&#9744;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Do not check if a smaller reporting company)</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Emerging growth company&nbsp;&#9746;</FONT></TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">If
an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for
complying with any new or revised financial or accounting standards pursuant to Section&nbsp;7(a)(2)(B) of the Securities Act.
&#9746;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 12pt"><B>CALCULATION
OF REGISTRATION FEE</B></FONT></P>

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<TR STYLE="vertical-align: top">
    <TD STYLE="width: 25%; border-top: Black 2.25pt double; border-right: Black 0.75pt solid; border-bottom: Black 0.75pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; vertical-align: bottom"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 9pt"><B>Title
                                         of Securities</B></FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 9pt"><B>to
        be Registered</B></FONT></P></TD>
    <TD STYLE="width: 18%; border-top: Black 2.25pt double; border-right: Black 0.75pt solid; border-bottom: Black 0.75pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; vertical-align: bottom"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 9pt"><B>Amount
                                         to be <BR>
Registered (1) </B></FONT></P></TD>
    <TD STYLE="width: 19%; border-top: Black 2.25pt double; border-right: Black 0.75pt solid; border-bottom: Black 0.75pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; vertical-align: bottom"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 9pt"><B>Proposed
                                         Maximum Offering </B></FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 9pt"><B>Price
        per Share</B></FONT></P></TD>
    <TD STYLE="width: 20%; border-top: Black 2.25pt double; border-right: Black 0.75pt solid; border-bottom: Black 0.75pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center; vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 9pt"><B>Proposed
    Maximum Aggregate Offering Price </B></FONT></TD>
    <TD STYLE="width: 18%; border-top: Black 2.25pt double; border-bottom: Black 0.75pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; vertical-align: bottom"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 9pt"><B>Amount
                                         of Registration Fee</B></FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 0.75pt solid; border-bottom: Black 2.25pt double; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Common
    Stock</FONT></TD>
    <TD STYLE="border-right: Black 0.75pt solid; border-bottom: Black 2.25pt double; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">250,000
    shares</FONT></TD>
    <TD STYLE="border-right: Black 0.75pt solid; border-bottom: Black 2.25pt double; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">$7.57(2)</FONT></TD>
    <TD STYLE="border-right: Black 0.75pt solid; border-bottom: Black 2.25pt double; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">$1,892,500(2)</FONT></TD>
    <TD STYLE="border-bottom: Black 2.25pt double; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"> $219.35</FONT></TD></TR>
</TABLE>
<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 9pt">(1)</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 9pt">In
                                         addition, pursuant to Rule 416(c) under the Securities Act of 1933, as amended (the &ldquo;Securities
                                         Act&rdquo;), this Registration Statement includes an indeterminate number of additional
                                         shares which may be offered and sold as a result of anti-dilution provisions described
                                         in the above-referenced plan.</FONT></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 9pt">(2)</FONT></TD><TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 9pt">Estimated
                                         solely for the purpose of calculating the amount of the registration fee and calculated
                                         pursuant to Rule 457(h)(1) and Rule 457(c) under the Securities Act.</FONT></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"></FONT></P>

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<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>PART
I</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>INFORMATION
REQUIRED IN THE SECTION 10(a) PROSPECTUS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

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<TD STYLE="width: 5%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item&nbsp;1.</B></FONT></TD><TD STYLE="width: 95%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Plan
                                         Information </B></FONT></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 38.25pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Aqua
Metals, Inc. (the &ldquo;Company&rdquo;) has adopted its Officer and Director Share Purchase Plan (&ldquo;Plan&rdquo;). The maximum
number of shares of common stock of the Company that are available for issuance under the Plan is 250,000 shares. This Registration
Statement on Form S-8 is filed with the Securities and Exchange Commission (&ldquo;Commission&rdquo;) for the purposes of registering
the 250,000 shares of the Company&rsquo;s common stock issuable under the Plan.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 38.25pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
document(s) containing the information specified in Part I of Form S-8 will be sent or given to participants in the Plan as specified
by Rule 428(b)(1) under the Securities Act of 1933, as amended (the &ldquo;Securities Act&rdquo;). Such documents are not being
filed with the Commission, but constitute, along with the documents incorporated by reference into this Registration Statement,
a prospectus that meets the requirements of Section&nbsp;10(a) of the Securities Act.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 5%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item&nbsp;2.</B></FONT></TD><TD STYLE="text-align: justify; width: 95%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Registrant
                                         Information and Employee Plan Annual Information </B></FONT></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
Company will furnish without charge to each person to whom the prospectus is delivered, upon the written or oral request of such
person, a copy of any and all of the documents incorporated by reference in Item&nbsp;3 of Part II of this Registration Statement
and incorporated by reference in the Section&nbsp;10(a) prospectus, other than exhibits to such documents (unless such exhibits
are specifically incorporated by reference to the information that is incorporated). Written requests should be made to Investor
Relations of Aqua Metals, Inc. at 1010 Atlantic Avenue, Alameda, California 95401 or to the email address at investor@aquametals.com.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt; text-transform: uppercase"><B>Part
</B></FONT><B><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">II</FONT></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>INFORMATION
REQUIRED</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>IN
THE REGISTRATION STATEMENT</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 5%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item&nbsp;3.</B></FONT></TD><TD STYLE="text-align: justify; width: 95%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Incorporation
                                         of Certain Documents by Reference </B></FONT></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
following documents filed by the Company with the Commission are incorporated by reference into this Registration Statement:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(a)</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
                                         Company&rsquo;s Annual Report on Form 10-K for the fiscal year ended December 31, 2016,
                                         which was filed on March 2, 2017;</FONT></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(b)</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
                                         Company&rsquo;s Quarterly Reports on Form 10-Q for the quarters ended March 31, 2017
                                         and June 30, 2017, which were filed on May&nbsp;10, 2017 and August 9, 2017, respectively;</FONT></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(c)</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
                                         Company&rsquo;s Current Reports on Form 8-K, which were filed on April 18, 2017, April
                                         21, 2017, May&nbsp;24, 2017, June&nbsp;15, 2017, July 31, 2017 and August 11, 2017;</FONT></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(d)</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
                                         description of the Company&rsquo;s common stock in its Form 8-A12B, which was filed on
                                         July&nbsp;24, 2015, and any amendments or reports filed for the purpose of updating this
                                         description; and</FONT></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(e)</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">All
                                         reports and other documents subsequently filed by the Company pursuant to Sections 13(a),
                                         13(c), 14 and 15(d) of the Exchange Act prior to the filing of a post-effective amendment
                                         which indicates that all securities offered have been sold or which deregisters all securities
                                         then remaining unsold.</FONT></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 5%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item&nbsp;4.</B></FONT></TD><TD STYLE="text-align: justify; width: 95%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Description
                                         of Securities </B></FONT></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 24.5pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Not
applicable.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 24.5pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 24.5pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"></FONT></P>

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    <DIV STYLE="page-break-before: always; margin-top: 6pt">&nbsp;</DIV>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 24.5pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 5%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item
                               5.</B></FONT></TD><TD STYLE="text-align: justify; width: 95%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Interests
                                         of Named Experts and Counsel </B></FONT></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
validity of the issuance of the shares of the Company&rsquo;s common stock offered by this Registration Statement has been passed
upon by Greenberg Traurig, LLP, Irvine, California.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 5%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item
                               6.</B></FONT></TD><TD STYLE="text-align: justify; width: 95%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Indemnification
                                         of Directors and Officers </B></FONT></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Section
145 of the General Corporation Law of the State of Delaware (the &ldquo;DGCL&rdquo;) permits a Delaware corporation to indemnify
any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding,
whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason
of the fact that the person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request
of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other
enterprise, against expenses (including attorneys&rsquo; fees), judgments, fines and amounts paid in settlement actually and reasonably
incurred by the person in connection with such action, suit or proceeding if the person acted in good faith and in a manner the
person reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal
action or proceeding, had no reasonable cause to believe the person&rsquo;s conduct was unlawful.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">In
the case of an action by or in the right of the corporation, Section 145 of the DGCL permits a Delaware corporation to indemnify
any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by
reason of the fact that the person is or was a director, officer, employee or agent of the corporation, or is or was serving at
the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust
or other enterprise, against expenses (including attorneys&rsquo; fees) actually and reasonably incurred by the person in connection
with such action, suit or proceeding if the person acted in good faith and in a manner the person reasonably believed to be in
or not opposed to the best interests of the corporation and except that no indemnification shall be made in respect of any claim,
issue or matter as to which such person shall have been adjudged to be liable to the corporation unless and only to the extent
that the Court of Chancery or the court in which such action or suit was brought shall determine upon application that, despite
the adjudication of liability but in view of all the circumstances of the case, such person is fairly and reasonably entitled
to indemnity for such expenses that the Court of Chancery or such other court shall deem proper.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Section
145 of the DGCL also permits a Delaware corporation to purchase and maintain insurance on behalf of any person who is or was a
director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director,
officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against any liability
asserted against such person and incurred by such person in any such capacity, or arising out of such person&rsquo;s status as
such, whether or not the corporation would have the power to indemnify such person against such liability under Section 145 of
the DGCL.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Article
Sixth of the Company&rsquo;s First Amended and Restated Certificate of Incorporation states that to the fullest extent permitted
by the DGCL the Company&rsquo;s directors shall not be personally liable to the Company or to its stockholders for monetary damages
for breach of fiduciary duty as a director. If the DGCL is amended after the date hereof to authorize corporate action further
eliminating or limiting the personal liability of directors, then the liability of the Company&rsquo;s directors shall be eliminated
or limited to the fullest extent permitted by the DGCL, as so amended.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Article
Sixth of the Company&rsquo;s First Amended and Restated Certificate of Incorporation provides that the Company may, to the fullest
extent permitted by applicable law, to provide indemnification of (and advancement of expenses to) its directors and officers,
and authorizes the Company, to the fullest extent permitted by applicable law, to provide indemnification of (and advancement
of expenses to) to other employees and agents (and any other persons to which the DGCL permits the Company to provide indemnification)
through bylaw provisions, agreements with such directors, officers, employees, agents or other persons, vote of stockholders or
disinterested directors or otherwise, subject only to limits created by the DGCL with respect to actions for breach of duty to
our corporation, our stockholders and others.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Article
Sixth of the Company&rsquo;s First Amended and Restated Certificate of Incorporation provides that the Company may maintain insurance,
at its expense, to protect the Company and any of its directors, officers, employees or agents against any such expense, liability
or loss, whether or not we have the power to indemnify such person.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"></FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Insofar
as indemnification for liabilities arising under the Securities Act, may be permitted to the Company&rsquo;s directors, officers
or persons controlling the Company pursuant to the provisions contained in the Company&rsquo;s Amended and Restated Certificate
of Incorporation, Bylaws, the DGCL or otherwise, the Company has been informed that, in the opinion of the SEC, such indemnification
is against public policy as expressed in the Securities Act and is therefore unenforceable. If a claim for indemnification against
such liabilities, other than the payment by the Company of expenses incurred or paid by one of its directors, officers or controlling
persons in the successful defense of any action, suit, or proceeding, is asserted by such director, officer or controlling person,
the Company will, unless in the opinion of our counsel the matter has been settled by controlling precedent, submit to a court
of appropriate jurisdiction the question whether such indemnification by the Company is against public policy as expressed in
the Securities Act and will be governed by the final adjudication of this issue.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 5%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item
                               7.</B></FONT></TD><TD STYLE="text-align: justify; width: 95%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Exemption
                                         from Registration Claimed </B></FONT></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 24.5pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Not
applicable.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 24.5pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 8%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item
                          8.</B></FONT></TD><TD STYLE="width: 92%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Exhibits.</B></FONT></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD STYLE="vertical-align: bottom; text-align: left"><B><U>Exhibit No.</U></B></TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; layout-grid-mode: line; text-align: center"><B><U>Description
    of Exhibits</U></B></TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="text-align: left; vertical-align: bottom">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: bottom; text-align: center">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; layout-grid-mode: line; text-align: center">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="text-align: left; vertical-align: bottom">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: bottom; width: 12%; border-bottom: Black 0.5pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Exhibit
</B></FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>No.</B></FONT></P></TD>
    <TD STYLE="vertical-align: top; width: 2%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="vertical-align: bottom; width: 55%; border-bottom: Black 0.5pt solid; layout-grid-mode: line; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Description</B></FONT></TD>
    <TD STYLE="vertical-align: top; width: 4%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="text-align: left; width: 27%; border-bottom: Black 0.5pt solid; vertical-align: bottom"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Method
of Filing</B></FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">5.1</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Opinion
    and Consent of Greenberg Traurig, LLP</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Filed
    electronically herewith</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">23.1</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Consent
    of Armanino LLP</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Filed
    electronically herewith</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">23.4</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Consent
    of Greenberg Traurig, LLP</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Included
    in Exhibit 5.1</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">24.1</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Power
    of Attorney</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="layout-grid-mode: line"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Included
    on the signature page to this registration statement</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">99.1</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Aqua
    Metals, Inc. Officer and Director Share Purchase Plan</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="layout-grid-mode: line"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Filed
    electronically herewith</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>SIGNATURES</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pursuant
to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it
meets all of the requirements of filing on Form S-8 and has duly caused this registration statement to be signed on its behalf
by the undersigned, thereunto duly authorized, in the city of Alameda, California on August 25,&nbsp;2017.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"></FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="2"><FONT STYLE="font-size: 10pt; text-transform: uppercase">AQUA METALS, INC.</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%">&nbsp;</TD>
    <TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 47%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">By:</FONT></TD>
    <TD STYLE="border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt"><I>/s/ Stephen R. Clarke</I></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Stephen R. Clarke</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Chief Executive Officer</FONT></TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>POWER
OF ATTORNEY</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Each
person whose signature appears below hereby constitutes and appoints Stephen R. Clarke and Mark Weinswig, and each of them, as
such person&rsquo;s true and lawful attorney-in-fact and agent, each with full powers of substitution and re-substitution, for
such person and in such person&rsquo;s name, place and stead, in any and all capacities, to sign any or all amendments (including
post effective amendments) to this Registration Statement, and to file the same, with all exhibits thereto, and other documents
in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and agent full power
and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully
to all intents and purposes as such person might or could do in person, hereby ratifying and confirming all that said attorney-in-fact
and agent or his or her substitute or substitutes, may lawfully do or cause to be done by virtue thereof.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pursuant
to the requirements of the Securities Act of 1933, this Registration Statement has been signed on August 25,&nbsp;2017 by the
following persons in the capacities indicated.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 45%"><FONT STYLE="font-size: 10pt"><B><U>Signature</U></B></FONT></TD>
    <TD STYLE="width: 5%">&nbsp;</TD>
    <TD STYLE="width: 50%"><FONT STYLE="font-size: 10pt"><B><U>Title</U></B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt"><I>/s/ Stephen R. Clarke</I></FONT></TD>
    <TD>&nbsp;</TD>
    <TD ROWSPAN="2"><FONT STYLE="font-size: 10pt">President, Chief Executive Officer and Director&nbsp;(Principal Executive Officer) </FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">Stephen R. Clarke</FONT></TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt"><I>/s/ Mark Weinswig</I></FONT></TD>
    <TD>&nbsp;</TD>
    <TD ROWSPAN="2"><FONT STYLE="font-size: 10pt">Chief Financial Officer (Principal Financial and Accounting Officer)</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">Mark Weinswig</FONT></TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt"><I>/s/ Thomas Murphy</I></FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Director</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">Thomas Murphy</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt"><I>/s/ Vincent L. DiVito</I></FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Director</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">Vincent L. Divito</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt"><I>/s/ Mark Slade</I></FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Director</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">Mark Slade</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt"><I>/s/ Mark Stevenson</I></FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Director</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">Mark Stevenson</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"></FONT></P>

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    <DIV STYLE="page-break-before: always; margin-top: 6pt">&nbsp;</DIV>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>INDEX
TO EXHIBITS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><U>No.</U></B></FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><U>Item</U></B></FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><U>Method
    of Filing</U></B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 6%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="s107309_ex5-1.htm">5.1</A></FONT></TD>
    <TD STYLE="width: 58%; padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Opinion
    and Consent of Greenberg Traurig, LLP </FONT></TD>
    <TD STYLE="width: 36%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Filed
electronically herewith</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="s107309_ex23-1.htm">23.1</A></FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Consent
    of Armanino LLP </FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Filed
electronically herewith</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">23.4</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Consent
of Greenberg Traurig, LLP </FONT></P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Included
    in Exhibit 5.1</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">24.1</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Power
    of Attorney </FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Included
on the signature page to this registration statement</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="s107309_ex99-1.htm">99.1</A></FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Aqua
    Metals, Inc. 2014 Officer and Director Share Purchase Plan</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Filed
electronically herewith</FONT></P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right">&nbsp;</P>

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{"company-data": {"conformed-name": "Aqua Metals, Inc.", "cik": "0001621832", "assigned-sic": "3341", "irs-number": "471169572", "state-of-incorporation": "DE"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-220171", "film-number": "171052067"}, "business-address": {"street1": "1010 ATLANTIC AVENUE", "city": "ALAMEDA", "state": "CA", "zip": "94501", "phone": "(510) 479-7635"}, "mail-address": {"street1": "1010 ATLANTIC AVENUE", "city": "ALAMEDA", "state": "CA", "zip": "94501"}}
As
filed with the Securities and Exchange Commission on August 25, 2017
Registration
No. ______
UNITED
STATES
SECURITIES
AND EXCHANGE COMMISSION
WASHINGTON,
D.C. 20549
FORM
S-8
REGISTRATION
STATEMENT
UNDER
THE SECURITIES ACT OF 1933
Aqua
Metals, Inc.
(Exact
name of registrant as specified in its charter)
Delaware
47-1169572
(State
or other jurisdiction of
incorporation
or organization)
(I.R.S.
Employer
Identification
No.)
1010
Atlantic Avenue
Alameda,
California
94501
(Address
    of Principal Executive Offices)
(Zip
    Code)
Officer
and Director Share Purchase Plan
(Full
title of the plan)
Mark
Weinswig
Chief
Financial Officer
Aqua
Metals, Inc.
1010
Atlantic Avenue
Alameda,
California 95401
(Name
and address of agent for service)
(510)
479-7635
(Telephone
number, including area code, of agent for service)
Indicate
by check mark whether the registrant is a large accelerated filter, an accelerated filer, a non-accelerated filer, or a smaller
reporting company. See the definitions of "large accelerated filer," "accelerated filer," "smaller
reporting company," and "emerging company" in Rule 12b-2 of the Exchange Act.:
Large accelerated filer ☐
Accelerated filer ☒
Non-accelerated filer ☐
Smaller reporting company ☐
(Do not check if a smaller reporting company)
Emerging growth company ☒
If
an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for
complying with any new or revised financial or accounting standards pursuant to Section 7(a)(2)(B) of the Securities Act.
☒
CALCULATION
OF REGISTRATION FEE
Title
                                         of Securities
to
        be Registered
Amount
                                         to be
Registered (1)
Proposed
                                         Maximum Offering
Price
        per Share
Proposed
    Maximum Aggregate Offering Price
Amount
                                         of Registration Fee
Common
    Stock
250,000
    shares
$7.57(2)
$1,892,500(2)
$219.35
(1)
In
                                         addition, pursuant to Rule 416(c) under the Securities Act of 1933, as amended (the "Securities
                                         Act"), this Registration Statement includes an indeterminate number of additional
                                         shares which may be offered and sold as a result of anti-dilution provisions described
                                         in the above-referenced plan.
(2)
Estimated
                                         solely for the purpose of calculating the amount of the registration fee and calculated
                                         pursuant to Rule 457(h)(1) and Rule 457(c) under the Securities Act.
PART
I
INFORMATION
REQUIRED IN THE SECTION 10(a) PROSPECTUS
Item 1.
Plan
                                         Information
Aqua
Metals, Inc. (the "Company") has adopted its Officer and Director Share Purchase Plan ("Plan"). The maximum
number of shares of common stock of the Company that are available for issuance under the Plan is 250,000 shares. This Registration
Statement on Form S-8 is filed with the Securities and Exchange Commission ("Commission") for the purposes of registering
the 250,000 shares of the Company's common stock issuable under the Plan.
The
document(s) containing the information specified in Part I of Form S-8 will be sent or given to participants in the Plan as specified
by Rule 428(b)(1) under the Securities Act of 1933, as amended (the "Securities Act"). Such documents are not being
filed with the Commission, but constitute, along with the documents incorporated by reference into this Registration Statement,
a prospectus that meets the requirements of Section 10(a) of the Securities Act.
Item 2.
Registrant
                                         Information and Employee Plan Annual Information
The
Company will furnish without charge to each person to whom the prospectus is delivered, upon the written or oral request of such
person, a copy of any and all of the documents incorporated by reference in Item 3 of Part II of this Registration Statement
and incorporated by reference in the Section 10(a) prospectus, other than exhibits to such documents (unless such exhibits
are specifically incorporated by reference to the information that is incorporated). Written requests should be made to Investor
Relations of Aqua Metals, Inc. at 1010 Atlantic Avenue, Alameda, California 95401 or to the email address at investor@aquametals.com.
Part
II
INFORMATION
REQUIRED
IN
THE REGISTRATION STATEMENT
Item 3.
Incorporation
                                         of Certain Documents by Reference
The
following documents filed by the Company with the Commission are incorporated by reference into this Registration Statement:
(a)
The
                                         Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2016,
                                         which was filed on March 2, 2017;
(b)
The
                                         Company's Quarterly Reports on Form 10-Q for the quarters ended March 31, 2017
                                         and June 30, 2017, which were filed on May 10, 2017 and August 9, 2017, respectively;
(c)
The
                                         Company's Current Reports on Form 8-K, which were filed on April 18, 2017, April
                                         21, 2017, May 24, 2017, June 15, 2017, July 31, 2017 and August 11, 2017;
(d)
The
                                         description of the Company's common stock in its Form 8-A12B, which was filed on
                                         July 24, 2015, and any amendments or reports filed for the purpose of updating this
                                         description; and
(e)
All
                                         reports and other documents subsequently filed by the Company pursuant to Sections 13(a),
                                         13(c), 14 and 15(d) of the Exchange Act prior to the filing of a post-effective amendment
                                         which indicates that all securities offered have been sold or which deregisters all securities
                                         then remaining unsold.
Item 4.
Description
                                         of Securities
Not
applicable.
Item
                               5.
Interests
                                         of Named Experts and Counsel
The
validity of the issuance of the shares of the Company's common stock offered by this Registration Statement has been passed
upon by Greenberg Traurig, LLP, Irvine, California.
Item
                               6.
Indemnification
                                         of Directors and Officers
Section
145 of the General Corporation Law of the State of Delaware (the "DGCL") permits a Delaware corporation to indemnify
any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding,
whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason
of the fact that the person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request
of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other
enterprise, against expenses (including attorneys' fees), judgments, fines and amounts paid in settlement actually and reasonably
incurred by the person in connection with such action, suit or proceeding if the person acted in good faith and in a manner the
person reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal
action or proceeding, had no reasonable cause to believe the person's conduct was unlawful.
In
the case of an action by or in the right of the corporation, Section 145 of the DGCL permits a Delaware corporation to indemnify
any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by
reason of the fact that the person is or was a director, officer, employee or agent of the corporation, or is or was serving at
the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust
or other enterprise, against expenses (including attorneys' fees) actually and reasonably incurred by the person in connection
with such action, suit or proceeding if the person acted in good faith and in a manner the person reasonably believed to be in
or not opposed to the best interests of the corporation and except that no indemnification shall be made in respect of any claim,
issue or matter as to which such person shall have been adjudged to be liable to the corporation unless and only to the extent
that the Court of Chancery or the court in which such action or suit was brought shall determine upon application that, despite
the adjudication of liability but in view of all the circumstances of the case, such person is fairly and reasonably entitled
to indemnity for such expenses that the Court of Chancery or such other court shall deem proper.
Section
145 of the DGCL also permits a Delaware corporation to purchase and maintain insurance on behalf of any person who is or was a
director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director,
officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against any liability
asserted against such person and incurred by such person in any such capacity, or arising out of such person's status as
such, whether or not the corporation would have the power to indemnify such person against such liability under Section 145 of
the DGCL.
Article
Sixth of the Company's First Amended and Restated Certificate of Incorporation states that to the fullest extent permitted
by the DGCL the Company's directors shall not be personally liable to the Company or to its stockholders for monetary damages
for breach of fiduciary duty as a director. If the DGCL is amended after the date hereof to authorize corporate action further
eliminating or limiting the personal liability of directors, then the liability of the Company's directors shall be eliminated
or limited to the fullest extent permitted by the DGCL, as so amended.
Article
Sixth of the Company's First Amended and Restated Certificate of Incorporation provides that the Company may, to the fullest
extent permitted by applicable law, to provide indemnification of (and advancement of expenses to) its directors and officers,
and authorizes the Company, to the fullest extent permitted by applicable law, to provide indemnification of (and advancement
of expenses to) to other employees and agents (and any other persons to which the DGCL permits the Company to provide indemnification)
through bylaw provisions, agreements with such directors, officers, employees, agents or other persons, vote of stockholders or
disinterested directors or otherwise, subject only to limits created by the DGCL with respect to actions for breach of duty to
our corporation, our stockholders and others.
Article
Sixth of the Company's First Amended and Restated Certificate of Incorporation provides that the Company may maintain insurance,
at its expense, to protect the Company and any of its directors, officers, employees or agents against any such expense, liability
or loss, whether or not we have the power to indemnify such person.
2
Insofar
as indemnification for liabilities arising under the Securities Act, may be permitted to the Company's directors, officers
or persons controlling the Company pursuant to the provisions contained in the Company's Amended and Restated Certificate
of Incorporation, Bylaws, the DGCL or otherwise, the Company has been informed that, in the opinion of the SEC, such indemnification
is against public policy as expressed in the Securities Act and is therefore unenforceable. If a claim for indemnification against
such liabilities, other than the payment by the Company of expenses incurred or paid by one of its directors, officers or controlling
persons in the successful defense of any action, suit, or proceeding, is asserted by such director, officer or controlling person,
the Company will, unless in the opinion of our counsel the matter has been settled by controlling precedent, submit to a court
of appropriate jurisdiction the question whether such indemnification by the Company is against public policy as expressed in
the Securities Act and will be governed by the final adjudication of this issue.
Item
                               7.
Exemption
                                         from Registration Claimed
Not
applicable.
Item
                          8.
Exhibits.
Exhibit No.
Description
    of Exhibits
Exhibit
No.
Description
Method
of Filing
5.1
Opinion
    and Consent of Greenberg Traurig, LLP
Filed
    electronically herewith
23.1
Consent
    of Armanino LLP
Filed
    electronically herewith
23.4
Consent
    of Greenberg Traurig, LLP
Included
    in Exhibit 5.1
24.1
Power
    of Attorney
Included
    on the signature page to this registration statement
99.1
Aqua
    Metals, Inc. Officer and Director Share Purchase Plan
Filed
    electronically herewith
3
SIGNATURES
Pursuant
to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it
meets all of the requirements of filing on Form S-8 and has duly caused this registration statement to be signed on its behalf
by the undersigned, thereunto duly authorized, in the city of Alameda, California on August 25, 2017.
AQUA METALS, INC.
By:
/s/ Stephen R. Clarke
Stephen R. Clarke
Chief Executive Officer
POWER
OF ATTORNEY
Each
person whose signature appears below hereby constitutes and appoints Stephen R. Clarke and Mark Weinswig, and each of them, as
such person's true and lawful attorney-in-fact and agent, each with full powers of substitution and re-substitution, for
such person and in such person's name, place and stead, in any and all capacities, to sign any or all amendments (including
post effective amendments) to this Registration Statement, and to file the same, with all exhibits thereto, and other documents
in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and agent full power
and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully
to all intents and purposes as such person might or could do in person, hereby ratifying and confirming all that said attorney-in-fact
and agent or his or her substitute or substitutes, may lawfully do or cause to be done by virtue thereof.
Pursuant
to the requirements of the Securities Act of 1933, this Registration Statement has been signed on August 25, 2017 by the
following persons in the capacities indicated.
Signature
Title
/s/ Stephen R. Clarke
President, Chief Executive Officer and Director (Principal Executive Officer)
Stephen R. Clarke
/s/ Mark Weinswig
Chief Financial Officer (Principal Financial and Accounting Officer)
Mark Weinswig
/s/ Thomas Murphy
Director
Thomas Murphy
/s/ Vincent L. DiVito
Director
Vincent L. Divito
/s/ Mark Slade
Director
Mark Slade
/s/ Mark Stevenson
Director
Mark Stevenson
4
INDEX
TO EXHIBITS
No.
Item
Method
    of Filing
5.1
Opinion
    and Consent of Greenberg Traurig, LLP
Filed
electronically herewith
23.1
Consent
    of Armanino LLP
Filed
electronically herewith
23.4
Consent
of Greenberg Traurig, LLP
Included
    in Exhibit 5.1
24.1
Power
    of Attorney
Included
on the signature page to this registration statement
99.1
Aqua
    Metals, Inc. 2014 Officer and Director Share Purchase Plan
Filed
electronically herewith