Warren County, New Jersey — public water systems
At a glance
219 active public water systems are filed under Warren County, New Jersey in EPA's SDWIS records, together reporting 326,592 people served. The largest is Nj American Water - Short Hills, which reports serving 217,230 people. 24 are community water systems serving people where they live; the other 195 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
219
Population served
326.6K
Community systems
24
Groundwater share
99.1%
How does Warren County compare with other New Jersey counties?
Warren County has the 6th-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 326,592 people served in total, the 13th-largest county figure in the state and 3.4% of the statewide total. The average system here reports serving 1,491 people, about half of 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 Warren County's drinking water come from?
By primary water source, Warren County's active systems draw on groundwater (215, 98%), surface water (2, 0.9%), groundwater under influence of surface water (1, 0.5%) and purchased groundwater (1, 0.5%). Overall, 99% rely mainly on groundwater (including purchased groundwater) and 0.9% 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, Nj American Water - Short Hills, draws primarily on surface water.
What kinds of water systems operate in Warren County?
Warren County's active systems break down as 24 community systems (11%), 37 non-transient non-community systems (17%) and 158 transient non-community systems (72%). 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 (81%), local government (13%), state government (4.1%) and federal government (1.8%).
The 50 largest water systems in Warren County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Nj American Water - Short Hills | Warren + 6 more | 217,230 | Community | Surface water |
| 2 | Aqua Nj - Phillipsburg | Warren | 26,686 | Community | Groundwater under influence of surface water |
| 3 | Hackettstown Mua | Warren | 22,000 | Community | Groundwater |
| 4 | Nj American Water - Washington/Oxford | Warren | 10,719 | Community | Groundwater |
| 5 | Allamuchy Twp Water & Sewer | Warren | 5,423 | Community | Groundwater |
| 6 | Nj American Water - Belvidere | Warren | 2,854 | Community | Groundwater |
| 7 | Alpha Municipal Water Works | Warren | 2,530 | Community | Groundwater |
| 8 | Acme Shopping Plaza | Warren | 1,550 | Non-transient non-community | Groundwater |
| 9 | Land of Make Believe | Warren | 1,506 | Transient non-community | Groundwater |
| 10 | Quick Chek #5 | Warren | 1,417 | Transient non-community | Groundwater |
| 11 | No Warren Reg High Sch | Warren | 1,200 | Non-transient non-community | Groundwater |
| 12 | Delaware Water Gap Travel Plaza | Warren | 1,150 | Non-transient non-community | Groundwater |
| 13 | Travel Centers of America | Warren | 1,070 | Non-transient non-community | Groundwater |
| 14 | Belvidere Shopping Plaza | Warren | 953 | Transient non-community | Groundwater |
| 15 | Mcdonalds of Clinton | Warren | 842 | Transient non-community | Groundwater |
| 16 | Mansfield Twp Elementary | Warren | 820 | Non-transient non-community | Groundwater |
| 17 | Dunkin Donuts | Warren | 814 | Transient non-community | Groundwater |
| 18 | Mcdonalds - Columbia | Warren | 810 | Transient non-community | Groundwater |
| 19 | Township of Blairstown Dpw | Warren | 800 | Community | Groundwater |
| 20 | D S M Nutritional Products Inc. | Warren | 636 | Non-transient non-community | Surface water |
| 21 | Mamma Maria | Warren | 515 | Transient non-community | Groundwater |
| 22 | White Township Dunkin Donuts | Warren | 513 | Transient non-community | Groundwater |
| 23 | Hope Tree Dunkin Donuts | Warren | 507 | Transient non-community | Groundwater |
| 24 | Del River Family Cmp Grn | Warren | 506 | Transient non-community | Groundwater |
| 25 | Mobil/7-Eleven | Warren | 506 | Transient non-community | Groundwater |
| 26 | Njdot Route 80 Rest Area | Warren | 500 | Transient non-community | Groundwater |
| 27 | Warren Haven Rehabilitation & Nursing Ct | Warren | 430 | Community | Groundwater |
| 28 | Lakeland Plaza | Warren | 418 | Transient non-community | Groundwater |
| 29 | Oakwood Bowling Lanes & Sports | Warren | 412 | Transient non-community | Groundwater |
| 30 | White Twp Consolidated School | Warren | 410 | Non-transient non-community | Groundwater |
| 31 | Kittatinny Visitor Center | Warren | 403 | Transient non-community | Groundwater |
| 32 | Warren Co Library-Cdh Branch | Warren | 358 | Transient non-community | Groundwater |
| 33 | Harmony Twp Elementary School | Warren | 353 | Non-transient non-community | Groundwater |
| 34 | Camp No-Be-Bo-Sco | Warren | 350 | Transient non-community | Groundwater |
| 35 | Veolia Water Nj Independence Highland | Warren | 350 | Community | Groundwater |
| 36 | Camp No Be Bo Sco (Shower Well) | Warren | 350 | Transient non-community | Groundwater |
| 37 | Great Meadows Middle | Warren | 348 | Non-transient non-community | Groundwater |
| 38 | Oxford Furnace Lake | Warren | 310 | Transient non-community | Groundwater |
| 39 | Country View Village, LLC | Warren | 310 | Community | Groundwater |
| 40 | Dept of Interior/Delaware Water Gap Nra | Warren | 305 | Transient non-community | Groundwater |
| 41 | Sunmart Sunoco Station & Convenience Sto | Warren | 303 | Transient non-community | Groundwater |
| 42 | Mansfield Twp Municipal Comple | Warren | 295 | Transient non-community | Groundwater |
| 43 | Fountain Mall | Warren | 282 | Transient non-community | Groundwater |
| 44 | Hope Twp Elementary School | Warren | 279 | Non-transient non-community | Groundwater |
| 45 | Independence Centralschool | Warren | 260 | Non-transient non-community | Groundwater |
| 46 | Rdj Service | Warren | 258 | Transient non-community | Groundwater |
| 47 | Belvidere Regional Pool | Warren | 257 | Transient non-community | Groundwater |
| 48 | Island Dragway | Warren | 255 | Transient non-community | Groundwater |
| 49 | Worthington State Park | Warren | 250 | Transient non-community | Groundwater |
| 50 | Knowlton Twp Elementary | Warren | 250 | Non-transient non-community | Groundwater |
All other water systems in Warren County (169)
The remaining active systems filed under Warren County, largest first, with the population each reports serving.
- Blairstown Commons238
- Forest Manor Retirement Home224
- Windtryst Apts216
- Race Farm208
- The Log Cabin207
- County of Warren Library - North206
- Nykuns Store & Bar206
- World Apostolate of Fati205
- 7 Eleven204
- Abundant Life Community Church203
- The Doghouse203
- Evangelical Church/Blair203
- Worthington State Park200
- Frelinghuysen Twp Elm Sc200
- Milbrook Village - Well 2200
- Blairstown Trades & Prof196
- Aqua Nj - Warren Glen192
- Ridge & Valley Charter School182
- Church of the Covenant172
- Villa Mattar Bistro170
- Ymca Camp Ralph S Mason168
- Presbyterian Camp and Co166
- Princeton Blairstown Ctr165
- Hope Center - Lower Well160
- Hope Center - Upper Well160
- U S Gas154
- Home Plate Dairy153
- Knowlton Presbyterian Church152
- St Rose of Lima Church151
- Borealis Compounds, Inc..145
- Congregation Jehovahs Wi140
- Aqua Nj - Brainards135
- James Alexander Corp133
- First Hope Bank127
- Blairstown Dairy126
- Highlander Hills Estates120
- Skylands Medical Building C/O Route 94 R119
- Camp Taylor Campground116
- Shops at Greenwich116
- Siddhachalam International Mission110
- Veolia Water Nj Independence Valley View110
- Buck Hill Brewery & Restaurant109
- Humpty Juniors106
- Triplebrook Family Campground105
- Triplebrook Family Campground105
- Township of Liberty104
- Rock Creek Tavern104
- Hot Dog Johnnys104
- Bel Pike Lanes103
- Harmony Spirits & Grocery103
- Riverside Diner103
- Bello Giorno102
- Roman Pizza102
- Inhouse102
- Jack'S Barn, the Loft102
- Brock Hollow Winery Banquet Facility101
- Mt Lake Fire Company101
- Happiness Is Camping at-Well #3100
- Franklin Twp Volunteer Fire Dept100
- Worthington State Park100
- The Lodge @ Mountain Lake100
- Little Hill Foundation Inc.100
- Knowlton United Methodis100
- Happiness Is Camping at-Well #1100
- Washington Shopping Center, Inc.98
- Hope Market96
- Calvary Community Church93
- Lutheran Church of the Good Shepherd90
- Riverside MHP85
- Knowlton Twp Recreation Park85
- Ise Farms Inc.83
- Dollar General83
- Silver Star, Bagels & Deli81
- Independence Recreation Comple80
- St Johns United Methodist Church80
- D S M Nutritional Products LLC80
- Mohican Outdoor Center-Dwgnra80
- Harkers Hollow Golf Club78
- Premier Health Associates LLC77
- Camp No-Be-Bo-Sco76
- Rossi Chrysler Dodge Jeep Ram75
- Harmony Twp Volunteer Fire Co75
- Donna'S Runaway Cafe75
- Princeton Education Cent75
- Hillside Village75
- Delaware Truck Stop LLC73
- Brass Castle Market71
- Luigi'S Rancho68
- Casella Major Account Services66
- Clover Rest Home64
- Aqua Nj - Riegelsville62
- Smittys Liquor Store62
- Golden Rule Karate & Fitness61
- 297 Rt 31 South LLC60
- Warren Residential Group60
- Nj State Police Barracks - Hope60
- The Inn at Millrace Pond60
- Oxford Heritage Manor60
- J P Kellys58
- Hope Pizzeria & Catering58
- Marley'S Jr57
- Aci Truckstop56
- Blairstown Twp Sycamore Park Rec Bldg56
- Alpine Meat Market55
- Elizabethtown Gas Co55
- Zeeks Place55
- Witte Company55
- Mobil Mart/Subway54
- Allamuchy Twp Dpw54
- Luis Liquor & Sub53
- Asbury Coffee Mill, LLC53
- Hunters Lodge52
- Water'S Edge52
- Stage Dolls52
- Oxford Spartan LLC52
- The Hutch51
- Jenny Jump State Forest50
- Camp Warren50
- White Twp Concession Stand50
- St Judes Catholic Church49
- Pequest State Fish Hatch49
- Warren County Health Department47
- Louie'S Pizzeria46
- Asbury Graphite Mills Inc.45
- Berkowitz Florida LLC45
- G20 Technologies LLC44
- Comcast Cable Vision44
- Merrill Creek Vistors Center43
- Gray Leasing Inc.43
- Ymca Camp Ralph S. Mason, Inc..42
- Allamuchy Corporate Center LLC40
- Aqua Nj - Harkers Hollow40
- Footbridge Condo Associates40
- Blairstown Municipal Building40
- Chefs Catering39
- Red Wolfe Inn38
- Edhard Corp37
- Independence Twp Fire Department35
- Animal Mansion Veterinary Hospital35
- Jenny Jump St Park-Site35
- Jenny Jump St Park-Site35
- Byron Place Ii34
- Traditions Residential Healthcare Fac34
- Atlas Mart33
- Kck Catering33
- Hunters Lodge - Motel32
- Mansfield Inn32
- Buttzville United Meth Ch32
- Harmony Bible Fellowship Church32
- Brook Hollow Winery32
- Triple Brook Mobile Home32
- Dasacc of Warren County32
- Imperial Machine & Tool Co31
- Four Sisters Winery & Farm Mkt30
- Alba Vineyard30
- The Holy House Convent30
- Oxford United Methodist30
- 10-31 Inc.29
- Mobil Truck Stop28
- Fitness Empire28
- The Lone Piligrim Pub28
- Villa Milagro Vineyards LLC28
- Yusen Logistics28
- Walter Hoving Home, Inc..28
- Signature Care Home @Great Meadows28
- Cramer Plating Inc.27
- Lions Den25
- Little Ridge Vineyard LLC25
- Harmony Recarea Snack B25
Warren County water systems: frequently asked questions
How many public water systems are in Warren County, New Jersey?
EPA's SDWIS records file 219 active public water systems under Warren County, New Jersey: 24 community systems (11%), 37 non-transient non-community systems (17%) and 158 transient non-community systems (72%).
Who supplies drinking water in Warren County, NJ?
The largest community water systems filed under Warren County are Nj American Water - Short Hills (217,230 people served), Aqua Nj - Phillipsburg (26,686 people served) and Hackettstown Mua (22,000 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 Warren County's drinking water come from groundwater or surface water?
Of the 219 active public water systems in Warren County, 99% draw mainly on groundwater and 0.9% on surface water, counting purchased supplies. The largest system, Nj American Water - Short Hills, uses surface water.
Where can I find a water quality report for Warren 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. 24 community systems are filed under Warren 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 Warren 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
- All New Jersey public water systems· 3,496 active
- Morris County· 302 systems
- Hunterdon County· 293 systems
- Burlington County· 292 systems
- Monmouth County· 288 systems
- Ocean County· 210 systems
- Atlantic County· 195 systems
- How to find out who supplies your drinking water
- How to find and read your annual water quality report
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 Warren County, New Jersey”, https://aquacensus.com/water-systems/new-jersey/warren (data as of October 1, 2026).