North Carolina
Town of Apex
City of Asheville
Brunswick  County - Leland
City of Hamlet
City of High Point
Metropolitan Sewer District - Asheville
City of Monroe
City of Mount Airy
Public Works Commission - Fayetteville
Town of Rose Hill
Salisbury Rowan Utilities - Salisbury
City of Sanford
City of Wilson
Woodfin Water - Woodfin

South Carolina
Grand Strand Water - Myrtle Beach
Low Country Water  -  Hampton

Bedford Regional Water Authority - Bedford