- Alexandria Sanitation Authority, VA
- AT&T Nassau Metals
- Atlantic City Sewerage Authority
- Bergen County, NJ
- Borough of Fort Lee, NJ
- Borough of Lincoln Park, NJ
- Camden County M.U.A.
- Cape May County M.U.A.
- City of Concord, NH
- City of Elizabeth, NJ
- City of New Bedford, CT
- City of Norwalk, CT
- City of Trenton, NJ
- City of Wilmington, NC
- COCEN Technologies
- County of Nassau Dept. of Public Works
- Empire State Development Corp.
- Hackensack Water Co.
- Hudson County Utilities
- International Tech. Corp.
- Mass Bay Transportation, MA
- Metropolitan District Comm.
- Middlesex County Utilities Authority
- New Castle County, DE
- NJ American Water Co.
- NJ Dept. of Transportation
- NJ Division of Buildings and Construction
- NJ Highway Authority
- NJ Turnpike Authority
- NJ Water Supply Authority
- North Hudson Sewerage Authority
- NYC Dept. of Design and Construction
- NYC Dept. of Environmental Protection
- NYC Dept. of Sanitation
- Ocean County Sewerage Authority
- Passaic Valley Sewerage Authority
- Stony Brook Sewerage Authority
- Town of Fairfield, CT
- Township of Barnegat, NJ
- Township of Cherry Hill, NJ
- Township of Mahwah, NJ
- Township of Parsipanny, NJ
- Township of Wayne, NJ