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Lewis County, New York — public water systems

At a glance

67 active public water systems are filed under Lewis County, New York in EPA's SDWIS records, together reporting 16,454 people served. The largest is Lowville Village, which reports serving 4,000 people. 15 are community water systems serving people where they live; the other 52 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

67

Population served

16.5K

Community systems

15

Groundwater share

95.5%

How does Lewis County compare with other New York counties?

Lewis County has the 43rd-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 16,454 people served in total, the 56th-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 246 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 Lewis County's drinking water come from?

By primary water source, Lewis County's active systems draw on groundwater (53, 79%), groundwater under influence of surface water (9, 13%), purchased groundwater (2, 3%) and surface water (2, 3%). Overall, 96% rely mainly on groundwater (including purchased groundwater) and 4.5% 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, Lowville Village, draws primarily on surface water.

What kinds of water systems operate in Lewis County?

Lewis County's active systems break down as 15 community systems (22%), 1 non-transient non-community systems (1.5%) and 51 transient non-community systems (76%). 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 (75%), local government (22%) and state government (3%).

The 50 largest water systems in Lewis County

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Active public water systems in Lewis County, New York
#Water systemCountyPopulation servedTypeSource
1Lowville VillageLewis4,000CommunitySurface water
2Croghan VillageLewis900CommunityGroundwater
3Copenhagen VillageLewis850CommunityGroundwater under influence of surface water
4Lyons Falls VillageLewis850CommunityGroundwater
5Port Leyden VillageLewis820CommunityGroundwater
6Beaver Falls Water DistrictLewis782CommunityPurchased groundwater
7Harrisville (Diana Wd 1)Lewis700CommunityGroundwater
8Natural Bridge Watertown Ny KoaLewis375Transient non-communityGroundwater
9Turin VillageLewis350CommunityGroundwater
10Denmark Wd 1Lewis350CommunityPurchased groundwater
11Lowville (T) Wd #1Lewis350CommunityPurchased surface water
12Castorland VillageLewis320CommunityGroundwater
13Martinsburg Water DistrictLewis310CommunityGroundwater
14Constableville VillageLewis310CommunitySurface water
15Watson Town Wd 4Lewis300CommunityGroundwater
16Cedar Creek CampgroundLewis300Transient non-communityGroundwater under influence of surface water
17Glenfield Water DistrictLewis300CommunityGroundwater
18Whetstone Gulf State ParkLewis250Transient non-communityGroundwater under influence of surface water
19Aldersgate Camp and Retreat CenterLewis220Transient non-communityGroundwater
20Brantingham Golf Club,Inc.Lewis200Transient non-communityGroundwater
21Camp UnirondackLewis200Transient non-communityGroundwater
22Lake Bonaparte MarinaLewis200Transient non-communityGroundwater
23Timberview Resort, Inc..Lewis200Transient non-communityGroundwater
24Flat Rock InnLewis200Transient non-communityGroundwater under influence of surface water
25Cedar PineLewis200Transient non-communityGroundwater
26Babcocks CampgroundLewis175Transient non-communityGroundwater
27Ridge View Motor Lodge, Inc..Lewis160Transient non-communityGroundwater
28Beaver Camp and MotelLewis150Transient non-communityGroundwater
29Oswegatchie Ffa CampLewis128Transient non-communityGroundwater
30Coachlight InnLewis120Transient non-communityGroundwater
31Kevins Tug Hill HideawayLewis120Transient non-communityGroundwater
32Carlowden Country ClubLewis101Transient non-communityGroundwater under influence of surface water
33Raven Acres CampgroundLewis100Transient non-communityGroundwater
34Whiskey Jacks Crowfoot Hill InnLewis80Transient non-communityGroundwater
35Tuggers Bar & Grill/CampgroundLewis80Transient non-communityGroundwater under influence of surface water
36Tug Hill InnLewis75Transient non-communityGroundwater
37Harrisville Rod & Gun Club,Inc.Lewis75Transient non-communityGroundwater
38Montague Inn Rest. & MotelLewis70Transient non-communityGroundwater under influence of surface water
39Nys Dec - DadvilleLewis60Transient non-communityGroundwater
40Buckhorn Bar & Grill LLC (the)Lewis60Transient non-communityGroundwater
41Pine Tree InnLewis60Transient non-communityGroundwater
42Crossroads TavernLewis54Transient non-communityGroundwater
43Doyles Pub & RestaurantLewis50Transient non-communityGroundwater
44Cedars Golf Course, Inc..Lewis50Transient non-communityGroundwater
45Otter Creek Horse TrailsLewis50Transient non-communityGroundwater
46Brantingham Station LLCLewis50Transient non-communityGroundwater
47Milk Plant TavernLewis50Transient non-communityGroundwater
48Highmarket InnLewis50Transient non-communityGroundwater under influence of surface water
49Brantingham Inn MotelLewis50Transient non-communityGroundwater
50Belfort InnLewis50Transient non-communityGroundwater

All other water systems in Lewis County (17)

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

Lewis County water systems: frequently asked questions

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

EPA's SDWIS records file 67 active public water systems under Lewis County, New York: 15 community systems (22%), 1 non-transient non-community systems (1.5%) and 51 transient non-community systems (76%).

Who supplies drinking water in Lewis County, NY?

The largest community water systems filed under Lewis County are Lowville Village (4,000 people served), Croghan Village (900 people served) and Copenhagen Village (850 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 Lewis County's drinking water come from groundwater or surface water?

Of the 67 active public water systems in Lewis County, 96% draw mainly on groundwater and 4.5% on surface water, counting purchased supplies. The largest system, Lowville Village, uses surface water.

Where can I find a water quality report for Lewis 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. 15 community systems are filed under Lewis 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 Lewis 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 Lewis County, New York”, https://aquacensus.com/water-systems/new-york/lewis (data as of October 1, 2026).