Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED
PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report of Waste Services, Inc. (“the Company”) on Form 10-Q for the period ended March 31, 2008 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, David Sutherland-Yoest, Chief Executive Officer, and Edwin D. Johnson, Chief Financial Officer, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of our knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

By:  /s/  DAVID SUTHERLAND-YOEST

David Sutherland-Yoest

Chief Executive Officer

By:  /s/  EDWIN D. JOHNSON

Edwin D. Johnson

Chief Financial Officer

Date: April 24, 2008