Exhibit 11

                     CLEAN HARBORS, INC. AND SUBSIDIARIES
                      COMPUTATION OF NET INCOME PER SHARE
                FOR THE THIRD QUARTER ENDED SEPTEMBER 30, 1995
                                (in thousands)
 
 

                                             Three Months Ended        Nine Months Ended
                                                September 30,             September 30, 
                                             ------------------        -----------------
                                                1995      1994            1995     1994 
                                             ------------------        -----------------
                                                                         
Net income (loss)                            $(1,200)    $ (138)       $(1,587)   $1,710
 Less preferred dividends accrued                112        117            335       329
                                             -------     ------         ------    ------
Adjusted net income (loss)                   $(1,312)    $ (255)       $(1,922)   $1,381
                                             =======     ======         ======    ======
Earnings per common and common                                                          
 equivalent share:                                                                      
                                                                                        
Weighted average number of                                                              
 shares outstanding                            9,435      9,431          9,433     9,429 

Incremental shares for stock options
 under treasury stock method                      --         --             --       220
                                             -------     ------         ------    ------
Weighted average number of
 common and common equivalent
 shares outstanding                            9,435      9,431          9,433     9,649
                                             -------     ------         ------    ------
Net earnings (loss) per common and common
 equivalent share                              $(.14)     $(.03)         $(.20)    $ .14
                                             =======     ======         ======    ======

Earnings per common and common
 equivalent share - assuming full
 dilution:

Weighted average number of
 shares outstanding                            9,435      9,431          9,433     9,429

Incremental shares for stock options
 under treasury stock method                      --         --             --       220
                                             -------     ------         ------    ------
Weighted average number of common
 and common equivalent shares outstanding -
 assuming full dilution                        9,435      9,431          9,433     9,649
                                             =======     ======         ======    ======
Net earnings (loss) per common and common
 equivalent share - assuming full
 dilution                                      $(.14)     $(.03)         $(.20)    $ .14
                                             =======     ======         ======    ======