Suffolk County, New York Water Systems

Suffolk County, New York

42 community water systems on record — 26 active, 16 inactive.

Every active community water system nationwide must produce a Consumer Confidence Report under the EPA's revised rule, effective for reports due July 1, 2027.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace New York’s official records. Always confirm current status with New York before making decisions based on this information.

Community water systems in Suffolk County, New York

System name	City	Population served	Status
BRENTWOOD WD	HAUPPAUGE	28,500	Inactive
BROOKHAVEN NATIONAL LABORATORY	UPTON	3,500	Active
CALVERTON HILLS OWNERS ASSOCIATION	CALVERTON	897	Active
CAMP HERO WATER DISTRICT	EAST HAMPTON	80	Inactive
DERING HARBOR WATER DISTRICT	SHELTER ISLAND HEIGHTS	14	Active
DIX HILLS WATER DISTRICT	HUNTINGTON	34,522	Active
DOUGHERTY WATER COMPANY	OAK BEACH	52	Inactive
EAST FARMINGDALE WATER DISTRICT	BAYSHORE	7,500	Inactive
FAIR HARBOR WATER DISTRICT	HAUPPAUGE	1,956	Inactive
FISCHERS COTTAGES	MONTAUK	19	Inactive
FISHERS ISLAND WATER WORKS	FISHERS ISLAND	380	Active
GREENLAWN WATER DISTRICT	GREENLAWN	42,000	Active
GREENPORT WATER DISTRICT	GREENPORT	2,050	Active
HAMPTON BAYS WATER DISTRICT	HAMPTON BAYS	12,500	Active
HAMPTON HOUSE APARTMENTS	NEW YORK	70	Inactive
HARBOR FARMS	MATTITUCK	84	Inactive
KNOX SCHOOL	NISSEQUOGUE	210	Inactive
MAIDSTONE PARK COTTAGES	EAST HAMPTON	34	Active
MCCARREN WATER SUPPLY	OAK BEACH	50	Inactive
MCCRODDEN WATER COMPANY	BABYLON	33	Inactive
NORTHPORT VA HOSPITAL	NORTHPORT	3,088	Active
OAK BEACH PUBLIC WATER SUPPLY	LINDENHURST	66	Active
OCEAN BAY PARK WATER CORP	BAYSIDE	2,000	Inactive
OCEAN BEACH WATER DISTRICT	OCEAN BEACH	4,500	Active
PECONIC RIVER MOBILE HOME PARK	NEW YORK	75	Active
PECONIC VIEW MOBILE HOME PARK	WEST ISLIP	40	Active
PILGRIM PSYCHIATRIC CENTER	BRENTWOOD	1,200	Inactive
QUAIL RIDGE APARTMENTS	SOUTHAMPTON	21	Inactive
RIVERHEAD WATER DISTRICT	RIVERHEAD	35,000	Active
RIVERSIDE WATER DISTRICT	HAUPPAUGE	2,050	Active
ROBERT MOSES STATE PARK	BABYLON	11,600	Active
SALTAIRE WATER DISTRICT	BAYSHORE	2,000	Active
SEAVIEW WATER COMPANY	SEAVIEW	1,400	Active
SHELTER ISLAND HEIGHTS ASSOCIATION	SHELTER ISLAND HEIGHTS	500	Active
SMITHTOWN WATER DISTRICT	KINGS PARK	19,635	Active
SOUTH HUNTINGTON WATER DISTRICT	CENTERPORT	81,760	Active
SPRINGS TAVERN	EAST HAMPTON	6	Inactive
ST JAMES WATER DISTRICT	KINGS PARK	10,587	Active
STONY BROOK WATER DISTRICT	HAUPPAUGE	4,836	Inactive
SUFFOLK COUNTY WATER AUTHORITY	HAUPPAUGE	1,100,000	Active
WEST GILGO BEACH ASSOCIATION	BAYSHORE	300	Active
WEST NECK WATER DISTRICT	SHELTER ISLAND	100	Active