<ARTICLE> 5 <LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CLEAN HARBORS, INC. FORM 10-Q DATED SEPTEMBER 30, 2000 AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. </LEGEND> <MULTIPLIER> 1,000 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-2000 <PERIOD-START> JAN-01-2000 <PERIOD-END> SEP-30-2000 <CASH> 1,118 <SECURITIES> 504 <RECEIVABLES> 51,831 <ALLOWANCES> 1,368 <INVENTORY> 2,860 <CURRENT-ASSETS> 56,921 <PP&E> 143,243 <DEPRECIATION> 87,121 <TOTAL-ASSETS> 149,165 <CURRENT-LIABILITIES> 92,456 <BONDS> 16,808 <PREFERRED-MANDATORY> 0 <PREFERRED> 1 <COMMON> 111 <OTHER-SE> 38,459 <TOTAL-LIABILITY-AND-EQUITY> 149,165 <SALES> 0 <TOTAL-REVENUES> 175,269 <CGS> 0 <TOTAL-COSTS> 124,289 <OTHER-EXPENSES> 39,069 <LOSS-PROVISION> 513 <INTEREST-EXPENSE> 6,998 <INCOME-PRETAX> 4,400 <INCOME-TAX> 294 <INCOME-CONTINUING> 4,106 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 4,106 <EPS-BASIC> 0.34 <EPS-DILUTED> 0.33