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                    <ccc>XXXXXXXX</ccc>
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            <liveTestFlag>LIVE</liveTestFlag>



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            <issuerCik>0000822818</issuerCik>
            <issuerName>CLEAN HARBORS INC</issuerName>
            <secFileNumber>001-34223</secFileNumber>
            <issuerAddress>
                <ns2:street1>42 Longwater Drive</ns2:street1>
                <ns2:city>Norwell</ns2:city>
                <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                <ns2:zipCode>02061</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>781-792-5000</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>LAUREN STATES</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Director</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>924</noOfUnitsSold>
            <aggregateMarketValue>225714.72</aggregateMarketValue>
            <noOfUnitsOutstanding>53899103</noOfUnitsOutstanding>
            <approxSaleDate>12/16/2024</approxSaleDate>
            <securitiesExchangeName>NYSE</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>05/24/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Awards</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>924</amountOfSecuritiesAcquired>
            <paymentDate>05/24/2023</paymentDate>
            <natureOfPayment>N/A</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for LAUREN STATES</name>
                <address>
                    <ns2:street1>42 Longwater Drive</ns2:street1>
                    <ns2:city>Norwell</ns2:city>
                    <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                    <ns2:zipCode>02061</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>11/15/2024</saleDate>
            <amountOfSecuritiesSold>308</amountOfSecuritiesSold>
            <grossProceeds>76932.24</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for LAUREN STATES</name>
                <address>
                    <ns2:street1>42 Longwater Drive</ns2:street1>
                    <ns2:city>Norwell</ns2:city>
                    <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                    <ns2:zipCode>02061</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>10/15/2024</saleDate>
            <amountOfSecuritiesSold>308</amountOfSecuritiesSold>
            <grossProceeds>80307.92</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>12/16/2024</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>05/23/2024</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Lauren States</signature>
        </noticeSignature>
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144
0001670022
XXXXXXXX
LIVE
0000822818
CLEAN HARBORS INC
001-34223
42 Longwater Drive
Norwell
MA
02061
781-792-5000
LAUREN STATES
Director
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
924
225714.72
53899103
12/16/2024
NYSE
Common
05/24/2023
Restricted Stock Awards
Issuer
N
924
05/24/2023
N/A
N
10b5-1 Sales for LAUREN STATES
42 Longwater Drive
Norwell
MA
02061
Common
11/15/2024
308
76932.24
10b5-1 Sales for LAUREN STATES
42 Longwater Drive
Norwell
MA
02061
Common
10/15/2024
308
80307.92
12/16/2024
05/23/2024
/s/ Lauren States