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Montgomery County, New York — public water systems

At a glance

53 active public water systems are filed under Montgomery County, New York in EPA's SDWIS records, together reporting 38,877 people served. The largest is Amsterdam (C), which reports serving 20,700 people. 18 are community water systems serving people where they live; the other 35 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

53

Population served

38.9K

Community systems

18

Groundwater share

84.9%

How does Montgomery County compare with other New York counties?

Montgomery County has the 47th-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 38,877 people served in total, the 46th-largest county figure in the state and 0.2% of the statewide total. The average system here reports serving 734 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 Montgomery County's drinking water come from?

By primary water source, Montgomery County's active systems draw on groundwater (40, 75%), surface water (5, 9.4%), purchased surface water (3, 5.7%) and purchased groundwater (3, 5.7%). Overall, 85% rely mainly on groundwater (including purchased groundwater) and 15% 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, Amsterdam (C), draws primarily on surface water.

What kinds of water systems operate in Montgomery County?

Montgomery County's active systems break down as 18 community systems (34%), 9 non-transient non-community systems (17%) and 26 transient non-community systems (49%). 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 (68%), local government (30%) and state government (1.9%).

The 50 largest water systems in Montgomery County

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Active public water systems in Montgomery County, New York
#Water systemCountyPopulation servedTypeSource
1Amsterdam (C)Montgomery20,700CommunitySurface water
2Amsterdam (T)Montgomery3,000CommunityPurchased surface water
3Canajoharie (V) Water WorksMontgomery2,300CommunitySurface water
4Fort Plain (V) Water WorksMontgomery2,250CommunitySurface water
5Nys Thruway-Pattersonville Service AreaMontgomery2,221Non-transient non-communityPurchased groundwater
6St. Johnsville Village Water WorksMontgomery1,700CommunitySurface water
7Fonda (V) Water WorksMontgomery1,080CommunitySurface water
8Palatine Bridge (V) Water WorksMontgomery900CommunityGroundwater
9Fultonville Village PwsMontgomery740CommunityGroundwater
10Nelliston (V) Water WorksMontgomery535CommunityPurchased surface water
11Florida (T) Water DistrictMontgomery432CommunityPurchased surface water
12Capstone Center for Rehab and NursingMontgomery330CommunityGroundwater
13Fulmont Early Childhood Services@TruaxMontgomery200Non-transient non-communityGroundwater
14Antlers Country ClubMontgomery160Transient non-communityGroundwater
15Valentinos RestaurantMontgomery150Transient non-communityGroundwater
16Country EstatesMontgomery150CommunityGroundwater
17Canajoharie Golf and Country ClubMontgomery137Transient non-communityGroundwater
18Pine Meadow MhcMontgomery100CommunityGroundwater
19Loopies Irish PubMontgomery100Transient non-communityGroundwater
20Karens ProduceMontgomery100Transient non-communityGroundwater
21Ripepis RestaurantMontgomery100Transient non-communityGroundwater
22Cps Family RestaurantMontgomery99Transient non-communityGroundwater
23Pattersonville Mobile Home #1Montgomery81CommunityGroundwater under influence of surface water
24Shady Lane Park, Inc..Montgomery80CommunityGroundwater
25Cronies RestaurantMontgomery75Transient non-communityGroundwater
26Faith Bible ChurchMontgomery75Non-transient non-communityGroundwater
27El Rancho Drive inMontgomery75Transient non-communityGroundwater
28Parkside Drive inMontgomery75Transient non-communityGroundwater
29Anderson Instrument CompanyMontgomery70Non-transient non-communityGroundwater
30Mountain Man Hunting ClubMontgomery65Transient non-communityGroundwater
31Driscoll FoodsMontgomery60Non-transient non-communityGroundwater
32Pattersonville Mobile Home #2Montgomery50CommunityGroundwater
33Lombardos Pizzeria PlusMontgomery50Transient non-communityGroundwater
34Country Club Estates-AntlersMontgomery50CommunityGroundwater
35Glen Water District 1Montgomery50Non-transient non-communityPurchased groundwater
36Ag Properties LLCMontgomery50Non-transient non-communityGroundwater
37Isaan Thai RestaurantMontgomery45Transient non-communityGroundwater
38Checkers Out SpeedwayMontgomery42Transient non-communityGroundwater
39Old Trail EstatesMontgomery40CommunityGroundwater
40Glen Water District 2Montgomery35Non-transient non-communityPurchased groundwater
41Stewarts #319Montgomery25Transient non-communityGroundwater
4267 Super - Stop / Adirondack TowingMontgomery25Transient non-communityGroundwater
43Me- Mas Country StoreMontgomery25Transient non-communityGroundwater
44Teds Ice Cream PlaceMontgomery25Transient non-communityGroundwater
45Stewarts #102Montgomery25Transient non-communityGroundwater
46Stewarts #655 / Mobile 300Montgomery25Transient non-communityGroundwater
47St. Johnsville Civic ClubMontgomery25Transient non-communityGroundwater
48Amvets Post #2000Montgomery25Transient non-communityGroundwater
49Tribes Hill DeliMontgomery25Transient non-communityGroundwater
50Kutiks Pollination ServicesMontgomery25Transient non-communityGroundwater

All other water systems in Montgomery County (3)

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

Montgomery County water systems: frequently asked questions

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

EPA's SDWIS records file 53 active public water systems under Montgomery County, New York: 18 community systems (34%), 9 non-transient non-community systems (17%) and 26 transient non-community systems (49%).

Who supplies drinking water in Montgomery County, NY?

The largest community water systems filed under Montgomery County are Amsterdam (C) (20,700 people served), Amsterdam (T) (3,000 people served) and Canajoharie (V) Water Works (2,300 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 Montgomery County's drinking water come from groundwater or surface water?

Of the 53 active public water systems in Montgomery County, 85% draw mainly on groundwater and 15% on surface water, counting purchased supplies. The largest system, Amsterdam (C), uses surface water.

Where can I find a water quality report for Montgomery 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. 18 community systems are filed under Montgomery 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 Montgomery 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 Montgomery County, New York”, https://aquacensus.com/water-systems/new-york/montgomery (data as of October 1, 2026).