Exhibit 24

                               POWER OF ATTORNEY
                                  (FORM 10-K)
 
    Know all men by these presents, that the individuals whose signatures appear
below constitute and appoint Alan S. McKim and Roger Koenecke, and each of them
acting alone, his true and lawful attorneys-in-fact and agents with full power
of substitution and resubstitution, to sign the Clean Harbors, Inc. Form 10-K
Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of
1934 for the fiscal year ended December 31, 1998, and to file the same with all
exhibits thereto, and all documents in connection therewith, with the Securities
and Exchange Commission, granting unto said attorneys-in-fact and agents, and
each of them, full power and authority to do and perform each and every act and
thing requisite and necessary to be done in and about the premises, as fully to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said substitute or substitutes may lawfully do or cause to
be done by virtue hereof.
 


          SIGNATURE                       TITLE                     DATE
- ------------------------------  --------------------------  -------------------
 
                                                      

     /s/ CHRISTY W. BELL
- ------------------------------  Director                      March 26, 1999
       Christy W. Bell
 
      /s/ JOHN F. KASLOW
- ------------------------------  Director                      March 26, 1999
        John F. Kaslow
 
    /s/ DANIEL J. MCCARTHY
- ------------------------------  Director                      March 26, 1999
      Daniel J. McCarthy
 
     /s/ JOHN T. PRESTON
- ------------------------------  Director                      March 26, 1999
       John T. Preston
 
     /s/ LORNE R. WAXLAX
- ------------------------------  Director                      March 26, 1999
       Lorne R. Waxlax