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This Clawback Policy of Clean Harbors, Inc. (the “Company”) provides for the recoupment of certain executive compensation paid by the Company or its subsidiaries on or after the “Effective Date” specified in Section 10 below in the event of an accounting restatement resulting from material noncompliance with financial reporting requirements under the federal securities laws. This Policy is designed to comply with Section 10D of the Securities Exchange Act of 1934, as amended (the “Exchange Act”).

Unless the Company’s Board of Directors (the “Board”) shall determine from time to time to itself administer this Policy, this Policy shall be administered by the Compensation Committee of the Board, and references herein to the Board shall be deemed references to the Compensation Committee. Any determination made by the Board shall be final and binding on all affected individuals.

This Policy applies to the current and former executive officers of the Company and its subsidiaries, as determined by the Board in accordance with Section 10D of the Exchange Act and the listing standards of the national securities exchange on which the Company’s securities are listed, and such other senior executives/employees who may from time to time be deemed subject to the Policy by the Board (“Covered Executives”). However, this Policy shall not apply to any compensation received by an executive before beginning service as an executive officer or if such person did not serve as an executive officer during any portion of the three-year recovery period described in Section 4.

In the event the Company is required to prepare an accounting restatement of its financial statements due to the Company’s material noncompliance with any financial reporting requirement under the securities laws, the Board will require reimbursement or forfeiture of any excess Incentive Compensation received by any Covered Executive during the three completed fiscal years immediately preceding the date on which the Company is required to prepare an accounting restatement.

•the date the Company’s Board concludes or reasonably should have concluded that the Company’s previously issued financial statements contain a material error; or

•the date a court, regulator, or other legal authorized body directs the Company to restate its previously issued financial statements to correct a material error.

For purposes of this Policy, Incentive Compensation means any of the following; provided that, such compensation is granted, earned, or vested based wholly or in part based on the attainment of a financial reporting measure:

The amount to be recovered will be the excess of the Incentive Compensation paid to the Covered Executive based on the erroneous data over the Incentive Compensation that would have been paid to the Covered Executive had it been based on the restated results, as determined by the Board.

If the Board cannot determine the amount of excess Incentive Compensation received by the Covered Executive directly from the information in the accounting restatement, then it will make its determination based on a reasonable estimate of the effect of the accounting restatement.

The Board will determine, in its sole discretion, the method for recouping Incentive Compensation hereunder which may include, without limitation:

(b)seeking recovery of any gain realized on the vesting, exercise, settlement, sale, transfer, or other disposition of any equity-based awards;

The Board is authorized to interpret and construe this Policy and to make all determinations necessary, appropriate, or advisable for the administration of this Policy. It is intended that this Policy be interpreted in a manner that is consistent with the requirements of Section 10D of the Exchange Act and any applicable rules or standards adopted by the Securities and Exchange Commission or any national securities exchange on which the Company’s securities are listed.

This Policy shall be effective as of August 30, 2023, the date on which the Policy was approved by the Board (the “Effective Date”), and shall apply to Incentive Compensation that is approved, awarded or granted to Covered Executives on or after that date.

The Board may amend this Policy from time to time in its discretion and shall amend this Policy as it deems necessary to reflect final regulations adopted by the Securities and Exchange Commission under Section 10D of the Exchange Act and to comply with any rules or standards adopted by a national securities exchange on which the Company’s securities are listed. The Board may terminate this Policy at any time.

The Board intends that this Policy will be applied to the fullest extent of the law. The Board may require that any employment agreement, equity award agreement, or similar agreement entered into on or after the Effective Date shall, as a condition to the grant of any benefit thereunder, require a Covered Executive to agree to abide by the terms of this Policy. Any right of recoupment under this Policy is in addition to, and not in lieu of, any other remedies

or rights of recoupment that may be available to the Company pursuant to the terms of any similar policy in any employment agreement, equity award agreement, or similar agreement and any other legal remedies available to the Company.

The Board shall recover any excess Incentive Compensation in accordance with this Policy unless such recovery would be impracticable, as determined by the Board in accordance with Rule 10D-1 of the Exchange Act and the listing standards of the national securities exchange on which the Company’s securities are listed.

This Policy shall be binding and enforceable against all Covered Executives and their beneficiaries, heirs, executors, administrators or other legal representatives.