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AquaCensus

New York public water systems

8,164 active systems regulated under the Safe Drinking Water Act, serving a reported 19.6M people across 99 counties.

Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

8,164

Population served

19.6M

Community systems

2,277

Groundwater share

91.3%

System types in New York

2,277

Community water system

703

Non-transient non-community water system

5,184

Transient non-community water system

Largest water systems in New York

The largest active public water systems in New York by population served
#Water systemCountyPopulation servedTypeSource
1New York City SystemRichmond8,271,000CommunitySurface water
2Suffolk County Water AuthoritySuffolk1,100,000CommunityGroundwater
3McwaOrleans768,458CommunitySurface water
4OcwaOnondaga350,000CommunitySurface water
5Ecwa DirectErie313,380CommunitySurface water
6Buffalo Water AuthorityErie276,000CommunitySurface water
7Veolia Water New YorkRockland270,000CommunitySurface water
8Liberty Utilities New York - LynbrookNassau220,000CommunityGroundwater
9Yonkers CityWestchester211,569CommunityPurchased surface water
10Rochester CityMonroe210,000CommunitySurface water
11Syracuse CityOnondaga192,000CommunitySurface water
12Veolia Water New York, Inc.. Rd-1Westchester146,732CommunityPurchased surface water
13Liberty Utilities New York - MerrickNassau135,000CommunityGroundwater
14Mvwa - Mohawk Valley Water AuthorityOneida126,250CommunitySurface water
15Wa of Western NassauNassau120,000CommunityGroundwater
16Town of Hempstead Water DepartmentNassau110,000CommunityGroundwater
17Albany CityAlbany98,000CommunitySurface water
18Ecwa AmherstErie92,697CommunityPurchased surface water
19Latham Water DistrictAlbany85,590CommunitySurface water
20South Huntington Water DistrictSuffolk81,760CommunityGroundwater
21Mount Vernon Water DepartmentWestchester73,893CommunityPurchased surface water
22Tonawanda, Town Water Dept.Erie72,571CommunitySurface water
23Schenectady City Water WorksSchenectady61,821CommunityGroundwater
24Westchester Joint Water WorksWestchester59,629CommunitySurface water
25White Plains CityWestchester59,559CommunityPurchased surface water

By county

Dutchess550 systemsSullivan495 systemsOrange452 systemsUlster446 systemsPutnam384 systemsWestchester271 systemsWarren233 systemsSt. Lawrence226 systemsSaratoga216 systemsColumbia202 systemsGreene196 systemsChautauqua193 systemsOtsego192 systemsBroome170 systemsOswego164 systemsClinton162 systemsJefferson157 systemsSteuben153 systemsSuffolk151 systemsCattaraugus147 systemsRensselaer145 systemsEssex137 systemsDelaware136 systemsOneida128 systemsHerkimer123 systemsWashington118 systemsFulton113 systemsTompkins111 systemsErie109 systemsChenango97 systemsWyoming94 systemsMadison93 systemsTioga93 systemsCayuga91 systemsFranklin89 systemsOnondaga88 systemsSeneca87 systemsHamilton84 systemsAllegany78 systemsChemung77 systemsCortland76 systemsLewis68 systemsAlbany68 systemsYates67 systemsSchoharie67 systemsSchuyler63 systemsMontgomery53 systemsOntario53 systemsRockland49 systemsLivingston47 systemsWayne45 systemsNassau44 systemsSchenectady35 systemsGenesee31 systemsMonroe25 systemsOrleans23 systemsNiagara21 systemsPike8 systemsCarbon4 systemsVan Buren4 systemsSusquehanna3 systemsLuzerne3 systemsAdams3 systemsAllegan3 systems
Lackawanna2 systems
Berks2 systems
Worcester2 systems
Hays1 systems
Schuylkill1 systems
Kendall1 systems
Pettis1 systems
Bradford1 systems
Snohomish1 systems
Montour1 systems
Stark1 systems
Berrien1 systems
Crawford1 systems
Lehigh1 systems
Lycoming1 systems
Morrow1 systems
Calcasieu Parish1 systems
York1 systems
Saginaw1 systems
Stone1 systems
Lancaster1 systems
San Joaquin1 systems
Webb1 systems
St. Tammany Parish1 systems
Montague1 systems
Lowndes1 systems
Cook1 systems
Prince George's1 systems
Harris1 systems
Butler1 systems
Mackinac1 systems
Gillespie1 systems
Lapeer1 systems
Richmond1 systems
Jack1 systems