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Hunterdon County, New Jersey — public water systems

At a glance

293 active public water systems are filed under Hunterdon County, New Jersey in EPA's SDWIS records, together reporting 91,772 people served. The largest is Clinton Water Dept, which reports serving 12,500 people. 25 are community water systems serving people where they live; the other 268 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

293

Population served

91.8K

Community systems

25

Groundwater share

99.7%

How does Hunterdon County compare with other New Jersey counties?

Hunterdon County has the 3rd-most active public water systems among the 62 counties listed for active New Jersey systems in EPA records; among the 27 with 3 or more systems, the median has 101. Its systems report 91,772 people served in total, the 19th-largest county figure in the state and 1% of the statewide total. The average system here reports serving 313 people, well below the New Jersey average of 2,750. 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 Hunterdon County's drinking water come from?

By primary water source, Hunterdon County's active systems draw on groundwater (292, 100%) and surface water (1, 0.3%). Overall, 100% rely mainly on groundwater (including purchased groundwater) and 0.3% on surface water, compared with 96% and 4.5% across New Jersey. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Clinton Water Dept, draws primarily on groundwater.

What kinds of water systems operate in Hunterdon County?

Hunterdon County's active systems break down as 25 community systems (8.5%), 71 non-transient non-community systems (24%) and 197 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 (78%), local government (17%) and state government (4.4%).

The 50 largest water systems in Hunterdon County

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Active public water systems in Hunterdon County, New Jersey
#Water systemCountyPopulation servedTypeSource
1Clinton Water DeptHunterdon12,500CommunityGroundwater
2Flemington Water DepartmentHunterdon4,581CommunityGroundwater
3Veolia Water New Jersey LambertvilleHunterdon3,960CommunitySurface water
4Washington Twp Mua-HagerHunterdon + 1 more3,458CommunityGroundwater
5High Bridge W DeptHunterdon3,300CommunityGroundwater
6State of Nj Spruce Run RecreatHunterdon2,800Transient non-communityGroundwater
7Glen Gardner W DeptHunterdon1,705CommunityGroundwater
8Voorhees High SchoolHunterdon1,700Non-transient non-communityGroundwater
9Milford W DeptHunterdon1,453CommunityGroundwater
10Hampton Borough Water DepartHunterdon1,401CommunityGroundwater
11Nj American Water - FrenchtownHunterdon1,373CommunityGroundwater
12Delaware Valley RegionalHunterdon1,055Non-transient non-communityGroundwater
13Exxonmobil Technology and Engineering CoHunterdon940Non-transient non-communityGroundwater
14Edna Mahan CorrectionalHunterdon940CommunityGroundwater
15Aqua Nj - CalifonHunterdon936CommunityGroundwater
16Verduccia Verducci PlazaHunterdon921Transient non-communityGroundwater
17Bishop & Bishop (Well #2Hunterdon895Non-transient non-communityGroundwater
18Jersey Cider WorksHunterdon810Transient non-communityGroundwater
19Bishop & Bishop Well # 1Hunterdon775Non-transient non-communityGroundwater
20Bulls Island - PicnicHunterdon700Transient non-communityGroundwater
21Hunterdon Hills PlayhouseHunterdon666Transient non-communityGroundwater
22Stockton Water DepartmentHunterdon650CommunityGroundwater
23Readington Middle SchoolHunterdon628Non-transient non-communityGroundwater
24Aqua Nj - Riegel RidgeHunterdon621CommunityGroundwater
25Readington Middle School Well #2Hunterdon620Non-transient non-communityGroundwater
26Quick Check Food StoreHunterdon620Transient non-communityGroundwater
27Ymca Deer Path ParkHunterdon595Transient non-communityGroundwater
28South Hunterdon Regional HsHunterdon589Non-transient non-communityGroundwater
29Holland Brook SchoolHunterdon575Non-transient non-communityGroundwater
30Grayrock VillageHunterdon566Transient non-communityGroundwater
31Rambling Pines Day CampHunterdon553Non-transient non-communityGroundwater
32Copper Hill SchoolHunterdon550Non-transient non-communityGroundwater
33Lebanon Twp Sch - Valley ViewHunterdon540Non-transient non-communityGroundwater
34Robert Hunter SchoolHunterdon525Non-transient non-communityGroundwater
35Speedway Service Station #03476Hunterdon507Transient non-communityGroundwater
36Dunkin DonutsHunterdon506Transient non-communityGroundwater
37Bloomsbury Citco Gas & GoHunterdon505Transient non-communityGroundwater
38The Corner StoreHunterdon505Transient non-communityGroundwater
39East Amwell School DistrictHunterdon504Non-transient non-communityGroundwater
40Polar-CubHunterdon503Transient non-communityGroundwater
41Delaware Township MuaHunterdon500CommunityGroundwater
42Am Best CoHunterdon500Non-transient non-communityGroundwater
43Kingwood Township SchoolHunterdon499Non-transient non-communityGroundwater
44Woodglen Elementary SchoolHunterdon490Non-transient non-communityGroundwater
45Old Turnpike SchoolHunterdon428Non-transient non-communityGroundwater
46Clinton Station DinerHunterdon420Transient non-communityGroundwater
47Pilot Travel CentersHunterdon414Transient non-communityGroundwater
48Food Mart/Dunkin DonutsHunterdon404Transient non-communityGroundwater
49Three Bridges SchoolHunterdon404Non-transient non-communityGroundwater
50Calvery Bible ChurchHunterdon402Transient non-communityGroundwater

All other water systems in Hunterdon County (243)

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

Also serving Hunterdon County

These systems serve several counties, including Hunterdon County. EPA lists another county first for them, so they are not included in the counts above.

Multi-county water systems that also serve Hunterdon County, New Jersey
Water systemCountyPopulation servedTypeSource
Nj American Water - Short HillsWarren + 6 more217,230CommunitySurface water

Hunterdon County water systems: frequently asked questions

How many public water systems are in Hunterdon County, New Jersey?

EPA's SDWIS records file 293 active public water systems under Hunterdon County, New Jersey: 25 community systems (8.5%), 71 non-transient non-community systems (24%) and 197 transient non-community systems (67%). At least 1 more system is listed under another county but also serve Hunterdon County.

Who supplies drinking water in Hunterdon County, NJ?

The largest community water systems filed under Hunterdon County are Clinton Water Dept (12,500 people served), Flemington Water Department (4,581 people served) and Veolia Water New Jersey Lambertville (3,960 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 Hunterdon County's drinking water come from groundwater or surface water?

Of the 293 active public water systems in Hunterdon County, 100% draw mainly on groundwater and 0.3% on surface water, counting purchased supplies. The largest system, Clinton Water Dept, uses groundwater.

Where can I find a water quality report for Hunterdon 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. 25 community systems are filed under Hunterdon 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 Hunterdon 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 Jersey 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 Hunterdon County, New Jersey”, https://aquacensus.com/water-systems/new-jersey/hunterdon (data as of October 1, 2026).