Massachusetts

• Auburn Sewer Department
• Avon Water Department
• Town of Blackstone
• Town of Bourne
• Braintree Water & Sewer Department
• Town of Brewster Water Department
• Town of Canton Water & Sewer Division
• Town of Charlton
• Town of Chatham Water and Sewer Division
• Town of Clinton
• COMM Water District
• Douglas Water & Sewer
• Dracut Water Supply District
• Duxbury Water Department
• Town of Easton
• Easton Water Department
• Town of Edgartown
• Edgartown Sewer Department
• Edgartown Water Department
• City of Everett Water & Sewer Department
• City of Fall River
• Hadley Water Department
• Halifax Water Department
• Town of Harwich
• Town of Harwich Water Department
• Hillcrest Water District
• Leicester Water Supply District
• Leominster Water and Sewer Department 
• Town of Lenox
• City of Malden Water & Sewer Department
• Marblehead Water & Sewer Department
• City of Marlborough Water and Sewer Division
• Town of Medway
• City of Melrose Water & Sewer Department
• Town of Middleborough
• Town of Middleton
• Town of Norfolk
• Town of Norfolk Water Department
• Town of North Andover
• Town of Northborough
• North Raynham Water District
• Town of North Reading
• North Sagamore Water District
• Oak Bluffs Water District
• Town of Orange
• Town of Pepperell
• Town of Plymouth Water and Sewer Division
• Town of Plympton
• Town of Randolph Water & Sewer Division
• Town of Seekonk
• Seekonk Water District

Massachusetts (Continued)

• Town of Sherborn
• Town of Southborough
• Town of Southbridge Water & Sewer Department
• South Hadley Fire District #2
• Tisbury Water Works
• Town of Tisbury Sewer Department
• Town of Tisbury Solid Waste
• West Boylston Water District
• City of Westfield Water Department
• Town of Yarmouth
• Town of Uxbridge

Rhode Island

• Town of Charlestown
• Town of Narragansett Water & Sewer Department
• Town of Smithfield
• Town of South Kingstown Water & Sewer Department
• Town of Westerly

Connecticut

• Town of Berlin
• Bridgeport WPCA
• Deep River WPCA
• Town of Morris
• Town of Warren
• Town of Washington

Louisiana

• City of Monroe Water & Sewer Department

New York

• Village of Fishkill
• Village of Greenport
• Village of Northville
• Village of Saranac Lake Water & Sewer Department
• Village of Southeast

Oregon

• City of West Linn Water & Sewer Department