CLHB Clean Harbors (MM)

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): December 3, 2008

CLEAN HARBORS, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code (781) 792-5000

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:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 3.01 . Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing .

On December 3, 2008, Clean Harbors, Inc. (the “Company”) issued a press release announcing that it has filed an application to list its common stock on the New York Stock Exchange (the “NYSE”). The Company has notified The NASDAQ Stock Market of the Company’s intention to list its common stock on the NYSE and to simultaneously delist such securities from The NASDAQ Global Select Market. Upon approval of its application, the Company expects the shares of its common stock to begin trading on the NYSE on December 15, 2008, under the symbol “CLH.” Until that time, the Company’s common stock will continue to trade on The NASDAQ Global Select Market under the symbol “CLHB.”

A copy of the press release is furnished as Exhibit 99.1 to this Form 8-K.

Item 9.01 . Financial Statements and Exhibits .

2

SIGNATURES

Pursuant to the requirements of the Securities and Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

3