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Herkimer County, New York — public water systems

At a glance

123 active public water systems are filed under Herkimer County, New York in EPA's SDWIS records, together reporting 48,130 people served. The largest is Ilion (V) Water Works, which reports serving 8,053 people. 35 are community water systems serving people where they live; the other 88 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.

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

Active systems

123

Population served

48.1K

Community systems

35

Groundwater share

89.4%

How does Herkimer County compare with other New York counties?

Herkimer County has the 25th-most active public water systems among the 100 counties listed for active New York systems in EPA records; among the 64 with 3 or more systems, the median has 94. Its systems report 48,130 people served in total, the 38th-largest county figure in the state and 0.2% of the statewide total. The average system here reports serving 391 people, well below the New York average of 2,374. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.

Where does Herkimer County's drinking water come from?

By primary water source, Herkimer County's active systems draw on groundwater (98, 80%), purchased surface water (7, 5.7%), groundwater under influence of surface water (6, 4.9%) and surface water (6, 4.9%). Overall, 89% rely mainly on groundwater (including purchased groundwater) and 11% on surface water, compared with 91% and 8.5% across New York. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Ilion (V) Water Works, draws primarily on surface water.

What kinds of water systems operate in Herkimer County?

Herkimer County's active systems break down as 35 community systems (28%), 5 non-transient non-community systems (4.1%) and 83 transient non-community systems (67%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (70%), local government (26%) and state government (4.1%).

The 50 largest water systems in Herkimer County

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Active public water systems in Herkimer County, New York
#Water systemCountyPopulation servedTypeSource
1Ilion (V) Water WorksHerkimer8,053CommunitySurface water
2Herkimer VillageHerkimer7,606CommunitySurface water
3Little Falls CityHerkimer4,605CommunitySurface water
4Frankfort (V) Water WorksHerkimer2,995CommunityGroundwater
5Mohawk (V) Water WorksHerkimer2,985CommunityGroundwater
6Nys Thruway - Indian Castle/IroquoisHerkimer2,780Non-transient non-communityGroundwater
7Dolgeville (V) PwsHerkimer2,166CommunitySurface water
8Old Forge-Thendara Water DistrictHerkimer1,275CommunityGroundwater
9East Herkimer Water DistrictHerkimer1,024CommunityPurchased surface water
10West Canada Jr-Sr High SchoolHerkimer900Non-transient non-communityGroundwater
11West Winfield VillageHerkimer862CommunityGroundwater
12Town of Webb Wd#1Herkimer780CommunityPurchased groundwater
13Newport VillageHerkimer740CommunityGroundwater under influence of surface water
14Frankfort Wd #2Herkimer700CommunityPurchased groundwater
15Middleville (V) Water WorksHerkimer550CommunityGroundwater
16Frankfort Wd #4 (Ilion)Herkimer535CommunityPurchased surface water
17Poland VillageHerkimer508CommunityGroundwater
18Nys-Nicks Lake State ParkHerkimer400Transient non-communityGroundwater
19Ilion Perimeter Water DistrictHerkimer354CommunityPurchased surface water
20Cedar Lake ClubHerkimer300Transient non-communityGroundwater
21Eagle Bay Park AssociationHerkimer300Transient non-communityGroundwater
22Dolgeville Rod & Gun ClubHerkimer250Transient non-communityGroundwater
23Millers Grove Trailer ParkHerkimer217CommunityGroundwater
24American Legion Adirondack #1118Herkimer200Transient non-communityGroundwater
25Herkimer Wd #3 (Highland-Steuben)Herkimer192CommunityPurchased surface water
26Frankfort Wd #11Herkimer186CommunityPurchased groundwater
27Adirondack Woodcraft CampsHerkimer186Transient non-communityGroundwater
28Beardslee CastleHerkimer150Transient non-communityGroundwater
29Trails End Campground & Mobile ParkHerkimer150CommunityGroundwater
30Duffys at the GlenmoreHerkimer150Transient non-communityGroundwater
31Salisbury VfdHerkimer150Transient non-communityGroundwater
32Stonebridge Restaurant and BanquetsHerkimer150Transient non-communityGroundwater
33Vfw Post 2338- George R. PritchardHerkimer150Transient non-communityGroundwater
34Htr AdirondacksHerkimer145Transient non-communityGroundwater
35Country Club GrilleHerkimer140Transient non-communityGroundwater
36Ymca Camp GorhamHerkimer138Transient non-communityGroundwater
37Wall Street MeadowsHerkimer130CommunityGroundwater
38Nys-Hinckley Day Use AreaHerkimer125Transient non-communityGroundwater
39Holiday Shores EstatesHerkimer125CommunityGroundwater
40Kenmore CottagesHerkimer125Transient non-communityGroundwater
41Cooperstown KoaHerkimer120Transient non-communityGroundwater
42Camp Mark ViiHerkimer110Transient non-communityGroundwater
43Manion Heights W.D.Herkimer105CommunityPurchased surface water
44Herkimer Diamond Mines, Inc..Herkimer101Transient non-communityGroundwater
45Maplewood Bbq & SpiritsHerkimer101Transient non-communityGroundwater
46Mccauley Mtn.Herkimer100Transient non-communityGroundwater
47Viking VillageHerkimer100Transient non-communityGroundwater
48Ilion Snow Drifters Club HouseHerkimer100Transient non-communityGroundwater
49Bella Vista RestaurantHerkimer100Transient non-communityGroundwater
50Covewood LodgeHerkimer100Transient non-communityGroundwater

All other water systems in Herkimer County (73)

The remaining active systems filed under Herkimer County, largest first, with the population each reports serving.

Herkimer County water systems: frequently asked questions

How many public water systems are in Herkimer County, New York?

EPA's SDWIS records file 123 active public water systems under Herkimer County, New York: 35 community systems (28%), 5 non-transient non-community systems (4.1%) and 83 transient non-community systems (67%).

Who supplies drinking water in Herkimer County, NY?

The largest community water systems filed under Herkimer County are Ilion (V) Water Works (8,053 people served), Herkimer Village (7,606 people served) and Little Falls City (4,605 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.

Does Herkimer County's drinking water come from groundwater or surface water?

Of the 123 active public water systems in Herkimer County, 89% draw mainly on groundwater and 11% on surface water, counting purchased supplies. The largest system, Ilion (V) Water Works, uses surface water.

Where can I find a water quality report for Herkimer County?

Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 35 community systems are filed under Herkimer County, so the report to look for is the one from the system that supplies your address.

How can I check violations for a water system in Herkimer County?

Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.

More New York water systems

About this data

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.

Cite as: AquaCensus, “Public water systems in Herkimer County, New York”, https://aquacensus.com/water-systems/new-york/herkimer (data as of October 1, 2026).