Albert Gallatin Municipal Borough

Aqua PA-Emlenton

The Authority of the Borough of Charleroi

Beaver Falls Water Authority

Belle Vernon Borough Municipal Authority

Brackenridge Borough

Carmichaels Water

City of Buckhannon

City of Elkins

City of Fairmont

City of Philippi

Clarksburg Water Board

Dunkard Valley Joint Municipal Authority

Duquesne Light Warwick AMD

East Dunkard Water Association

Greenville Water Authority

Harrison Township Water Authority

Jefferson Township Municipal Authority

Kingwood Waterworks

Kittanning Suburban Water Authority

Lower Ten Mile Joint Sewer Authority

Masontown Municipal Water Works

Moon Township Water Authority

Morgantown Utility Board

Mount Morris Water and Sewage Authority

Municipal Authority of Buffalo Township

Municipal Authority of New Kensington

Municipal Authority of Westmoreland County

Municipal Authority Township of Robinson

New Kensington Water Authority

Newell Municipal Water Authority

North Fayette County Municipal Authority

Oakmont Borough Municipal Authority

Parker City Water Authority

Pennsylvania American Water-Aldrich, Brownsville

Pittsburgh Water and Sewer Authority

Point Marion Boro

Redstone Township Municipal Authority

Reynolds Water Authority

Southwestern Pennsylvania Water Authority

Tarentum Water

Taylor County Public Service District

Tri County Joint Municipal Authority

Washington Township Municipal Authority

West View Water Authority

Wilkinsburg-Penn Joint Water Authority

WV American-Weston