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Madison County, New York — public water systems

At a glance

95 active public water systems are filed under Madison County, New York in EPA's SDWIS records, together reporting 32,359 people served. The largest is Oneida City, which reports serving 11,393 people. 23 are community water systems serving people where they live; the other 72 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

95

Population served

32.4K

Community systems

23

Groundwater share

97.9%

How does Madison County compare with other New York counties?

Madison County has the 31st-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 32,359 people served in total, the 49th-largest county figure in the state and 0.2% of the statewide total. The average system here reports serving 341 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 Madison County's drinking water come from?

By primary water source, Madison County's active systems draw on groundwater (85, 89%), groundwater under influence of surface water (7, 7.4%), purchased groundwater (1, 1.1%) and purchased surface water (1, 1.1%). Overall, 98% rely mainly on groundwater (including purchased groundwater) and 2.1% 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, Oneida City, draws primarily on surface water.

What kinds of water systems operate in Madison County?

Madison County's active systems break down as 23 community systems (24%), 7 non-transient non-community systems (7.4%) and 65 transient non-community systems (68%). 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 (76%), local government (21%) and state government (3.2%).

The 50 largest water systems in Madison County

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Active public water systems in Madison County, New York
#Water systemCountyPopulation servedTypeSource
1Oneida CityMadison11,393CommunitySurface water
2Hamilton VillageMadison4,107CommunityGroundwater
3Cazenovia VillageMadison2,900CommunityGroundwater
4Morrisville State CollegeMadison2,620CommunityGroundwater
5Morrisville VillageMadison2,199CommunityGroundwater
6Suburbans Community MHPMadison655CommunityGroundwater
7Stockbridge Water DistrictMadison600CommunityPurchased surface water
8Cazenovia/Nelson Purchase DistrictMadison595CommunityPurchased groundwater
9Lebanon Reservoir CampgroundMadison576Transient non-communityGroundwater
10Deruyter VillageMadison558CommunityGroundwater
11Earlville VillageMadison545CommunityGroundwater
12New WoodstockMadison460CommunityGroundwater
13Morrisville Eaton Central SchoolMadison405Non-transient non-communityGroundwater
14Madison VillageMadison390CommunityGroundwater
15GeorgetownMadison300CommunityGroundwater
16Brookfield Central SchoolMadison300Non-transient non-communityGroundwater
17ErievilleMadison150CommunityGroundwater
18Bethany Retreat Main HouseMadison150Transient non-communityGroundwater
19Camp HuntMadison125Transient non-communityGroundwater
20Route 8 EstatesMadison125CommunityGroundwater
21Camp FiverMadison120Transient non-communityGroundwater
22Cobblefield Wellington EstatesMadison120CommunityGroundwater
23Cedar Valley CampsiteMadison120Transient non-communityGroundwater
24New Life Christian SchoolMadison102Non-transient non-communityGroundwater
25Chittenango Falls State ParkMadison100Transient non-communityGroundwater under influence of surface water
26Owera PointMadison100CommunityGroundwater
27Valley Mobile Home ParkMadison90CommunityGroundwater
28Torpys Pond Outdoor ClubMadison80Transient non-communityGroundwater
29Mount PleasantMadison75CommunityGroundwater
30Kanon Valley Country ClubMadison75Transient non-communityGroundwater
31Klings MillsMadison75Transient non-communityGroundwater
32Pelco Component TechnologiesMadison70Non-transient non-communityGroundwater
33White Eagle the GroveMadison61Transient non-communityGroundwater
34Madison Mennonite ChurchMadison56Transient non-communityGroundwater
35Madison MarketplaceMadison52Non-transient non-communityGroundwater under influence of surface water
36Chenango CourtMadison50CommunityGroundwater
37Glendening BoathouseMadison50Transient non-communityGroundwater
38Unadilla Forks Baptist ChurchMadison50Transient non-communityGroundwater
39Big Als DinerMadison50Transient non-communityGroundwater under influence of surface water
40Cazenovia Athletic AssociationMadison50Transient non-communityGroundwater
41Brookview CampgroundMadison50Transient non-communityGroundwater
42White Eagle Mitchell PointMadison50Transient non-communityGroundwater
43Ray Brothers BarbequeMadison50Transient non-communityGroundwater
44White Pines Mobile Home ParkMadison49CommunityGroundwater
45Heritage FarmsMadison48Transient non-communityGroundwater
46Shiloh Christian Family CampgroundMadison43Transient non-communityGroundwater
47Anw Ez MartMadison40Transient non-communityGroundwater
48Cazenovia Childrens HouseMadison40Non-transient non-communityGroundwater
49Kountry Kupboard IiMadison40Transient non-communityGroundwater
50Beaver Den DinerMadison40Transient non-communityGroundwater

All other water systems in Madison County (45)

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

Madison County water systems: frequently asked questions

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

EPA's SDWIS records file 95 active public water systems under Madison County, New York: 23 community systems (24%), 7 non-transient non-community systems (7.4%) and 65 transient non-community systems (68%).

Who supplies drinking water in Madison County, NY?

The largest community water systems filed under Madison County are Oneida City (11,393 people served), Hamilton Village (4,107 people served) and Cazenovia Village (2,900 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 Madison County's drinking water come from groundwater or surface water?

Of the 95 active public water systems in Madison County, 98% draw mainly on groundwater and 2.1% on surface water, counting purchased supplies. The largest system, Oneida City, uses surface water.

Where can I find a water quality report for Madison 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. 23 community systems are filed under Madison 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 Madison 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 Madison County, New York”, https://aquacensus.com/water-systems/new-york/madison (data as of October 1, 2026).