Northern Basin Group
• Allegheny Valley COG
• Aspinwall Borough
• Avalon
• Bellevue
• Ben Avon
• Ben Avon Heights
• Blawnox Borough
• City of Pittsburgh
• Emsworth Borough
• Etna Borough
• Fox Chapel Borough
• Franklin Park
• Girty’s Run Joint Sewer Authority
• Indiana Township
• Kilbuck Township
• McCandless
• McCandless Township Sanitary Authority
• Millvale Borough
• Neville Township
• North Hills COG
• O’Hara Township
• Ohio Township
• Ohio Township Sanitary Authority
• Quaker Valley COG
• Reserve Township
• Ross Township
• Shaler Township
• Sharpsburg Borough
• West View Borough
• West View Water Authority