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

COUNTY WATER-SYSTEM LEDGER

Suffolk, 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.

Systems12active CWS · pop. 2,500+
Population served1,358,692reported total; may overlap
Current violation flag8.3%1 systems
Serious-violator flag8.3%1 systems

01 / SYSTEMS

Water systems serving Suffolk

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

Water systemPopulation servedPrimary sourceCurrent export status
Suffolk County Water AuthorityNY51105261,100,000Ground waterNo current violation flagged
South Huntington Water DistrictNY510326381,760Ground waterNo current violation flagged
Greenlawn Water DistrictNY510327142,000Ground waterCurrent serious-violator flag
Riverhead Water DistrictNY510370535,000Ground waterNo current violation flagged
Dix Hills Water DistrictNY510327634,522Ground waterNo current violation flagged
Smithtown Water DistrictNY510565619,635Ground water purchasedNo current violation flagged
Hampton Bays Water DistrictNY510370412,500Ground waterNo current violation flagged
Robert Moses State ParkNY511767111,600Ground waterNo current violation flagged
St James Water DistrictNY510326610,587Ground water purchasedNo current violation flagged
Ocean Beach Water DistrictNY51032804,500Ground waterNo current violation flagged
Brookhaven National LaboratoryNY51118913,500Ground waterNo current violation flagged
Northport Va HospitalNY51118943,088Ground waterNo current violation flagged

02 / SOURCE MIX

Ground water10 systems · 1,328,470 served
Ground water purchased2 systems · 30,222 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.