Carolina’s Chapter of the American Backflow Prevention Association http://www.carolinachapterabpa.org/Home.aspx
American Backflow Prevention Association http://www.abpa.org/
North Carolina American Water Works Association &
North Carolina Water Environment Association (NC AWWA-WEA http://www.ncsafewater.org/
North Carolina Rural Water Association http://www.ncrwa.com/
American Water Works Association https://www.awwa.org/