<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS OF CLEAN HARBORS, INC. FOR THE QUARTER ENDED       
SEPTEMBER 30, 1994, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000822818
<NAME> CLEAN HARBORS, INC.
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
                    
<PERIOD-TYPE>          9-MOS
<FISCAL-YEAR-END>                   DEC-31-1994
<PERIOD-END>                        SEP-30-1994
<EXCHANGE-RATE>                               1
<CASH>                                      929
<SECURITIES>                                  0
<RECEIVABLES>                            47,763
<ALLOWANCES>                              1,571
<INVENTORY>                               2,607
<CURRENT-ASSETS>                         52,657
<PP&E>                                  117,912
<DEPRECIATION>                           46,907
<TOTAL-ASSETS>                          162,032
<CURRENT-LIABILITIES>                    29,278
<BONDS>                                  62,483
<COMMON>                                     95
<PREFERRED-MANDATORY>                         0
<PREFERRED>                                   1
<OTHER-SE>                               68,690
<TOTAL-LIABILITY-AND-EQUITY>            162,032
<SALES>                                  53,258  
<TOTAL-REVENUES>                         53,258  
<CGS>                                    37,459  
<TOTAL-COSTS>                            37,459  
<OTHER-EXPENSES>                              0  
<LOSS-PROVISION>                            177  
<INTEREST-EXPENSE>                        1,942  
<INCOME-PRETAX>                           1,913  
<INCOME-TAX>                                831  
<INCOME-CONTINUING>                       1,082  
<DISCONTINUED>                                0  
<EXTRAORDINARY>                           1,220  
<CHANGES>                                     0  
<NET-INCOME>                               (138)  
<EPS-PRIMARY>                              (.03) 
<EPS-DILUTED>                              (.03)