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<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="3"><B>UNITED
STATES<BR>SECURITIES AND EXCHANGE COMMISSION</B><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B><BR>WASHINGTON,
D.C. 20549</B></FONT></FONT></FONT></FONT></P>

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<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>FORM
8-K</B></FONT></FONT></P>

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<A NAME="A005"></A>
<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">CURRENT
REPORT<BR>Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934</FONT></FONT></P>

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<A NAME="A006"></A>
<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>Date
of Report (Date of earliest event reported): &nbsp;&nbsp;&nbsp;April 4, 2007</B><BR></FONT></FONT></P>

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<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="6"><B>ADA-ES, INC.
</B><BR><FONT SIZE="2">(Exact name of registrant as specified in its charter)</FONT></FONT></FONT> </P>


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    <TH colSpan=2><FONT face="Times New Roman, Times, Serif" size=2></FONT></TH>
    <TH colSpan=2><FONT face="Times New Roman, Times, Serif"
  size=2></FONT></TH></TR>
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    <TD align=left width="37%"><FONT face="Times New Roman, Times, Serif"
      size=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Colorado</B></FONT></TD>
    <TD align=left width="4%"><FONT face="Times New Roman, Times, Serif"
      size=2>&nbsp;</FONT></TD>
    <TD align=left width="30%"><FONT face="Times New Roman, Times, Serif"
      size=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>000-50216</B></FONT></TD>
    <TD align=left width="4%"><FONT face="Times New Roman, Times, Serif"
      size=2>&nbsp;</FONT></TD>
    <TD align=left width="23%"><FONT face="Times New Roman, Times, Serif"
      size=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>84-1457385</B></FONT></TD>
    <TD align=left width="2%"><FONT face="Times New Roman, Times, Serif"
      size=2>&nbsp;</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD align=left><FONT face="Times New Roman, Times, Serif" size=2>(State or other jurisdiction
      </FONT></TD>
    <TD align=left><FONT face="Times New Roman, Times, Serif"
      size=2>&nbsp;</FONT></TD>
    <TD align=left><FONT face="Times New Roman, Times, Serif"
      size=2>Commission File Number</FONT></TD>
    <TD align=left><FONT face="Times New Roman, Times, Serif"
      size=2>&nbsp;</FONT></TD>
    <TD align=center><FONT face="Times New Roman, Times, Serif" size=2>I.R.S.
      Employer</FONT></TD>
    <TD align=left><FONT face="Times New Roman, Times, Serif"
      size=2>&nbsp;</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD align=left><FONT face="Times New Roman, Times, Serif" size=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;of incorporation)</FONT></TD>
    <TD align=left><FONT face="Times New Roman, Times, Serif"
      size=2>&nbsp;</FONT></TD>
    <TD align=left><FONT face="Times New Roman, Times, Serif"
size=2></FONT></TD>
    <TD align=left><FONT face="Times New Roman, Times, Serif"
      size=2>&nbsp;</FONT></TD>
    <TD align=left><FONT face="Times New Roman, Times, Serif"
      size=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Identification No.</FONT></TD>
    <TD align=left><FONT face="Times New Roman, Times, Serif"
      size=2>&nbsp;</FONT></TD></TR></TABLE><BR><BR>

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<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>8100 SouthPark Way, B, Littleton, Colorado 80120
</B><BR> (Address of principal executive offices)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(Zip Code)</FONT></FONT> </P>

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<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Registrant&#146;s telephone number, including
area code:  <B>(303) 734-1727</B></FONT></FONT> </P>

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<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B><BR>Not Applicable</B><BR>(Former name
or former address, if changed since last report)</FONT></FONT> </P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Check the
appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the
filing obligation of the registrant  under any of the following provisions:</FONT></FONT></P>

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     <TD ALIGN="LEFT" WIDTH="3%"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">[&nbsp;&nbsp;&nbsp;]</FONT></FONT></TD>
     <TD WIDTH="97%"><P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">&nbsp;&nbsp; Written
communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</FONT></FONT> </P></TD>
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<BR>

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     <TD ALIGN="LEFT" WIDTH="3%"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">[&nbsp;&nbsp;&nbsp;]</FONT></FONT></TD>
     <TD WIDTH="97%"><P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">&nbsp;&nbsp;
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</FONT></FONT> </P></TD>
</TR>
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<BR>

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     <TD ALIGN="LEFT" WIDTH="3%"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">[&nbsp;&nbsp;&nbsp;]</FONT></FONT></TD>
     <TD WIDTH="97%"><P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">&nbsp;&nbsp;
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act <BR>&nbsp;&nbsp;&nbsp;(17 CFR 240.14d-2(b))</FONT></FONT> </P></TD>
</TR>
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<BR>

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     <TD ALIGN="LEFT" WIDTH="3%"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">[&nbsp;&nbsp;&nbsp;]</FONT></FONT></TD>
     <TD WIDTH="97%"><P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">&nbsp;&nbsp;
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act <BR>&nbsp;&nbsp;&nbsp;(17 CFR 240.13e-4(c))</FONT></FONT> </P></TD>
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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>Item 7.01
Regulation FD Disclosure.</B></FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">On
April 4, 2007, ADA-ES will be presenting at the Howard Weil Energy Conference in
New Orleans, Louisiana. A copy of the presentation materials is attached hereto
as an exhibit.</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>Item 9.01.
Financial Statements and Exhibits</B></FONT></FONT></P>



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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">(d)<BR>The
following item is filed as an exhibit to this report:</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">99.1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Howard
Weil Energy Conference Presentation.</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>SIGNATURES</B></FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant
to the requirements of the Securities Exchange Act of 1934, the Registrant duly
caused this report to be signed on its behalf by the undersigned thereunto duly
authorized.</FONT></FONT></P>

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     <TD WIDTH="50%">&nbsp;</TD>
     <TD><P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>ADA-ES,
Inc.</B><BR> Registrant</FONT></FONT> </P></TD>
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<BR>


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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Date:  April 4,
2007</FONT></FONT></P>

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     <TD WIDTH="50%">&nbsp;</TD>
     <TD><P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><U>/s/&nbsp;&nbsp;&nbsp;
Mark H. McKinnies</U> <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Mark H. McKinnies <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Senior VP &amp; Chief Financial Officer</FONT></FONT> </P></TD>
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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>INDEX TO
EXHIBITS</B></FONT></FONT></P>



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<TR VALIGN="BOTTOM">
     <TH COLSPAN="2"><FONT FACE="Times New Roman, Times, Serif" SIZE="2">Exhibit No.</FONT><HR WIDTH="100%" SIZE="1" COLOR="BLACK" NOSHADE></TH>
     <TH COLSPAN="2"><FONT FACE="Times New Roman, Times, Serif" SIZE="2">Description</FONT><HR WIDTH="100%" SIZE="1" COLOR="BLACK" NOSHADE></TH>
</TR>
<TR VALIGN="BOTTOM">
     <TD WIDTH="4%" ALIGN="RIGHT"><FONT SIZE="2"></FONT></TD>
        <TD WIDTH="12%" ALIGN="LEFT"><FONT SIZE="2">&nbsp;</FONT></TD>
     <TD WIDTH="82%" ALIGN="LEFT"><FONT SIZE="2">&nbsp;</FONT></TD>
     <TD WIDTH="2%" ALIGN="LEFT"><FONT SIZE="2">&nbsp;</FONT></TD>
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     <TD ALIGN="RIGHT"><FONT SIZE="2"></FONT></TD>
        <TD ALIGN="LEFT"><FONT SIZE="2">&nbsp;&nbsp;99.1</FONT></TD>
     <TD ALIGN="LEFT"><FONT SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Howard Weil Energy Conference Presentation</FONT></TD><TD ALIGN="LEFT"><FONT SIZE="2">&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
     <TD>&nbsp;</TD><TD></TD>
     <TD></TD><TD></TD>
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AutoCoded Document
UNITED
STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON,
D.C. 20549
FORM
8-K
CURRENT
REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date
of Report (Date of earliest event reported):    April 4, 2007
ADA-ES, INC.
(Exact name of registrant as specified in its charter)
Colorado
000-50216
84-1457385
(State or other jurisdiction
Commission File Number
I.R.S.
      Employer
of incorporation)
Identification No.
8100 SouthPark Way, B, Littleton, Colorado 80120
(Address of principal executive offices)       (Zip Code)
Registrant's telephone number, including
area code:
(303) 734-1727
Not Applicable
(Former name
or former address, if changed since last report)
Check the
appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the
filing obligation of the registrant  under any of the following provisions:
[   ]
Written
communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
[   ]
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
[   ]
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act
(17 CFR 240.14d-2(b))
[   ]
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act
(17 CFR 240.13e-4(c))
Item 7.01
Regulation FD Disclosure.
On
April 4, 2007, ADA-ES will be presenting at the Howard Weil Energy Conference in
New Orleans, Louisiana. A copy of the presentation materials is attached hereto
as an exhibit.
Item 9.01.
Financial Statements and Exhibits
(d)
The
following item is filed as an exhibit to this report:
99.1     Howard
Weil Energy Conference Presentation.
SIGNATURES
Pursuant
to the requirements of the Securities Exchange Act of 1934, the Registrant duly
caused this report to be signed on its behalf by the undersigned thereunto duly
authorized.
ADA-ES,
Inc.
Registrant
Date:  April 4,
2007
/s/   
Mark H. McKinnies
Mark H. McKinnies
Senior VP & Chief Financial Officer
INDEX TO
EXHIBITS
Exhibit No.
Description
99.1
Howard Weil Energy Conference Presentation