Greenport Water District
http://villageofgreenport.org/
Riverhead Water District
http://www.townofriverheadny.gov/
Saint James Water District
http://www.smithtownny.gov/
South Farmingdale Water District
South Huntington Water District
Greenlawn Water District
Dix Hills Water District
http://www.huntingtonny.gov/DHWD
SCWA Water District
https://www.scwa.com/backflowprevention