Nassau County, New York Water Systems

Nassau County, New York

43 community water systems on record — 40 active, 3 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 Nassau County, New York

System name	City	Population served	Status
ALBERTSON WD	ROSLYN HEIGHTS	13,500	Active
BAYVILLE (V)	BAYVILLE	6,700	Active
BETHPAGE WD	BETHPAGE	33,000	Active
CARLE PLACE WD	CARLE PLACE	9,005	Active
CATHEDRAL GARDENS WD	WEST HEMPSTEAD	1,500	Active
EAST WILLISTON (V)	EAST WILLISTON	2,556	Active
FARMINGDALE (V)	FARMINGDALE	8,744	Active
FRANKLIN SQUARE WD	FRANKLIN SQUARE	20,000	Active
FREEPORT (V)	FREEPORT	45,000	Active
GARDEN CITY (V)	GARDEN CITY	23,272	Active
GARDEN CITY PARK WD	GARDEN CITY PARK	18,000	Active
GLEN COVE CITY	GLEN COVE	28,000	Active
GLENWOOD WD	GLENWOOD LANDING	1,000	Active
HEMPSTEAD (V)	HEMPSTEAD	56,000	Active
HICKSVILLE WD	HICKSVILLE	48,000	Active
JERICHO WD	SYOSSET	58,000	Active
LIBERTY UTILITIES NEW YORK - LYNBROOK	MERRICK	220,000	Active
LIBERTY UTILITIES NEW YORK - MERRICK	MERRICK	135,000	Active
LIBERTY UTILITIES NEW YORK - MILL NECK	MERRICK	280	Active
LIBERTY UTILITIES NEW YORK - SEA CLIFF	MERRICK	13,400	Active
LIDO-POINT LOOKOUT WD	EAST MEADOW	2,000	Active
LOCUST VALLEY WD	LOCUST VALLEY	7,500	Active
LONG BEACH CITY	LONG BEACH	35,000	Active
MANHASSET LAKEVILLE WD	GREAT NECK	43,000	Active
MASSAPEQUA WD	MASSAPEQUA	43,000	Active
MINEOLA (V)	MINEOLA	20,600	Active
NE FARMINGDALE WD	OYSTER BAY	405	Inactive
OLD WESTBURY (V)	OLD WESTBURY	4,700	Active
OYSTER BAY WD	OYSTER BAY	8,700	Active
PLAINVIEW WD	—	34,000	Active
PLANDOME (V)	PLANDOME	1,600	Active
PORT WASHINGTON WD	PORT WASHINGTON	34,000	Active
ROCKVILLE CENTRE (V)	ROCKVILLE CENTRE	24,700	Active
ROSLYN WD	ROSLYN	17,000	Active
SANDS POINT (V)	PORT WASHINGTON	2,900	Active
SOUTH FARMINGDALE WD	FARMINGDALE	44,700	Active
SPLIT ROCK WATER SUPPLY	OYSTER BAY	11	Inactive
SWAN COVE WATER SUPPLY	OYSTER BAY	80	Inactive
TOWN OF HEMPSTEAD WATER DEPARTMENT	EAST MEADOW	110,000	Active
WA OF WESTERN NASSAU	NEW HYDE PARK	120,000	Active
WEST HEMPSTEAD WD	WEST HEMPSTEAD	32,031	Active
WESTBURY WD	WESTBURY	20,500	Active
WILLISTON PARK (V)	WILLISTON PARK	7,287	Active