Ballard County: 

             Wickliffe Sewer Sytem.

             Barlow Sewer Sytem.

             Kevil Water and Sewer Sytem.

             La Center Water System.

        Calloway County:

            Murray Water and Waste Water System.

            South 641 Water District.

        Carlisle County:

            Bardwell City Utilities.

            Arlington Water and Sewer Department.

            Carlisle County Sanitation District # 1.

        Fulton County: 

            Hickman Municipal Sewer System.

            Fulton Municipal Water System.

        Graves County:

            Mayfield Electric & Water System.

            Graves County Water District - Fancy Farm.

            Symsonia Water & Sewer District.

            Wingo Water & Sewer System.

        Hickman County:

            City of Clinton.

        Marshall County:

            Benton Water & Sewer System.

            Calvert City Municipal Water & Sewer.

            Hardin Sewer System.

            Marshall County Sanitation District # 1.

            Marshall County Sanitation District # 2.

        McCracken County:

            Paducah McCracken County JSA - Paducah STP.

            Paducah McCracken County JSA - Reidland STP.

            Paducah McCracken County JSA - Woodlawn STP.