EPA EXPORT · 13 SEP 2026FEDERAL COMPLIANCE RECORDS · NOT A HOME WATER TEST
TAP WATERLEDGERPublic system compliance records

COUNTY WATER-SYSTEM LEDGER

Nassau, New York

Compare active community water systems serving this county in EPA's public export. Systems can serve multiple places, so population totals may overlap.

Systems35active CWS · pop. 2,500+
Population served1,347,795reported total; may overlap
Current violation flag0.0%0 systems
Serious-violator flag0.0%0 systems

01 / SYSTEMS

Water systems serving Nassau

Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.

Water systemPopulation servedPrimary sourceCurrent export status
Liberty Utilities New York - LynbrookNY2902835220,000Ground waterNo current violation flagged
Liberty Utilities New York - MerrickNY2902840135,000Ground waterNo current violation flagged
Wa Of Western NassauNY2902830120,000Ground waterNo current violation flagged
Town Of Hempstead Water DepartmentNY2900000110,000Ground waterNo current violation flagged
Jericho WdNY290283158,000Ground waterNo current violation flagged
Hempstead (V)NY290282756,000Ground waterNo current violation flagged
Hicksville WdNY290282948,000Ground waterNo current violation flagged
Freeport (V)NY290282345,000Ground waterNo current violation flagged
South Farmingdale WdNY290285444,700Ground waterNo current violation flagged
Manhasset Lakeville WdNY290283643,000Ground waterNo current violation flagged
Massapequa WdNY290283743,000Ground waterNo current violation flagged
Long Beach CityNY290283435,000Ground waterNo current violation flagged
Plainview WdNY290284534,000Ground waterNo current violation flagged
Port Washington WdNY291226734,000Ground waterNo current violation flagged
Bethpage WdNY290281733,000Ground waterNo current violation flagged
West Hempstead WdNY290285732,031Ground waterNo current violation flagged
Glen Cove CityNY290282628,000Ground waterNo current violation flagged
Rockville Centre (V)NY290284824,700Ground waterNo current violation flagged
Garden City (V)NY290282423,272Ground waterNo current violation flagged
Mineola (V)NY290283920,600Ground waterNo current violation flagged
Westbury WdNY290285620,500Ground waterNo current violation flagged
Franklin Square WdNY290282220,000Ground waterNo current violation flagged
Garden City Park WdNY290282518,000Ground waterNo current violation flagged
Roslyn WdNY290285117,000Ground waterNo current violation flagged
Albertson WdNY290281513,500Ground waterNo current violation flagged
Liberty Utilities New York - Sea CliffNY290285313,400Ground waterNo current violation flagged
Carle Place WdNY29028189,005Ground waterNo current violation flagged
Farmingdale (V)NY29028218,744Ground waterNo current violation flagged
Oyster Bay WdNY29028448,700Ground waterNo current violation flagged
Locust Valley WdNY29028337,500Ground waterNo current violation flagged
Williston Park (V)NY29028587,287Ground waterNo current violation flagged
Bayville (V)NY29028166,700Ground waterNo current violation flagged
Old Westbury (V)NY29028434,700Ground waterNo current violation flagged
Sands Point (V)NY29028522,900Ground waterNo current violation flagged
East Williston (V)NY29028202,556Ground water purchasedNo current violation flagged

02 / SOURCE MIX

Ground water34 systems · 1,345,239 served
Ground water purchased1 systems · 2,556 served
How to read the population total

It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.