New Jersey Water Quality Report
Tap water quality data for 172 cities in New Jersey, updated 2026.
US average: 100 ppm
88 of 172 cities violation-free
172 cities tested
172 water systems tracked
Cleanest Tap Water in New Jersey
Cities with the fewest water quality issues
Lodi Boro-0231
817K served
Montvale Boro-0236
810K served
Hillsdale Boro-0227
809K served
Woodcliff Lake Boro-0268
809K served
Alpine Boro-0202
793K served
Bergenfield Boro-0203
793K served
Bogota Boro-0204
793K served
Carlstadt Boro-0205
793K served
Cliffside Park Boro-0206
793K served
Closter Boro-0207
793K served
Most Water Quality Issues in New Jersey
Cities with the most violations and concerns
Mount Olive Twp.-1427
245K served
Hopewell Twp.1106-
218K served
Hamilton Twp.-1103
256K served
Lawrence Twp.-1107
227K served
Ewing Twp.-1102
217K served
Trenton City-1111
217K served
Keansburg Boro-1321
388K served
Egg Harbor Twp-0108
122K served
East Orange City-0705
369K served
Moorestown Twp.-0322
285K served
Water Hardness Across New Jersey
Not sure what your hardness means? Use our Water Hardness Calculator or find the best hardness test kits.
New Jersey Tap Water: What You Need to Know
New Jersey has 172 tracked water utilities serving approximately 78.2M residents. The average water hardness is 89 ppm (5.2 GPG), classified as Moderately Hard — below the national average of 100 ppm. Hardness ranges from 9.4 ppm in Voorhees Twp.-0434 to 281 ppm in Jersey City-0906.
In the past 3 years, 84 of 172 cities in New Jersey have recorded water quality violations, totaling 2570 violations (63 health-based). All 172 tested cities have lead levels below the EPA action level of 15 ppb.
Frequently Asked Questions About New Jersey Water
Is tap water safe to drink in New Jersey?
Most tap water in New Jersey meets EPA standards, but 84 cities have recorded violations in the past 3 years (63 health-based). We recommend checking your specific city's report on TapWater.org and considering a home water test.
How hard is the water in New Jersey?
New Jersey's average water hardness is 89 ppm (5.2 GPG), classified as Moderately Hard. This is below the national average of 100 ppm. Hardness varies significantly by city — use our Water Hardness Calculator to check your specific area.
Which city in New Jersey has the cleanest tap water?
Based on EPA violation data, lead testing, and water quality metrics, Lodi Boro-0231 ranks as having the cleanest tap water in New Jersey. It has zero violations in the past 3 years.
Which city in New Jersey has the most water quality issues?
Mount Olive Twp.-1427 currently has the most water quality concerns in New Jersey, with 347 violations in the past 3 years. Residents should check their city's detailed water quality report and consider using a certified water filter.
Where does New Jersey get its water from?
The majority of New Jersey's water systems (83%) use surface water as their primary source. Surface water comes from rivers, lakes, and reservoirs. Each city's specific source can vary — check individual city reports for details.
Largest Cities in New Jersey
The 16 biggest utilities by population served — hardness, lead status, and violations at a glance
Lodi Boro-0231
Utility serves 817K
Montvale Boro-0236
Utility serves 810K
Hillsdale Boro-0227
Utility serves 809K
Woodcliff Lake Boro-0268
Utility serves 809K
Wallington Boro-0265
Utility serves 804K
Alpine Boro-0202
Utility serves 793K
Bergenfield Boro-0203
Utility serves 793K
Bogota Boro-0204
Utility serves 793K
Carlstadt Boro-0205
Utility serves 793K
Cliffside Park Boro-0206
Utility serves 793K
Closter Boro-0207
Utility serves 793K
Cresskill Boro-0208
Utility serves 793K
Demarest Boro-0209
Utility serves 793K
Dumont Boro-0210
Utility serves 793K
East Rutherford Boro-0212
Utility serves 793K
Edgewater Boro-0213
Utility serves 793K
More Cities in New Jersey
All 172 covered cities, A–Z
- Aberdeen Twp-1330
- Absecon City-0101
- Asbury Park City-1303
- Atlantic City-0102
- Audubon Boro-0401
- Audubon Park Boro-0402
- Barrington Boro-0403
- Bay Head Boro-1502
- Bedminster Twp.-1801
- Belleville Town-0701
- Bellmawr Boro-0404
- Belvidere Town-2103
- Berkeley Heights Twp.-2001
- Bernards Twp.-1802
- Bernardsville Boro-1803
- Beverly City-0302
- Bloomfield Town-0702
- Bradley Beach Boro-1307
- Brick Twp.-1506
- Burlington Twp.-0306
- Camden City-0408
- Chatham Boro-1404
- Cherry Hill Twp.-0409
- Chester Twp.-1407
- Cinnaminson Twp.-0308
- Clementon Boro-0411
- Delanco Twp.-0309
- Delran Twp.-0310
- East Orange City-0705
- Eatontown Boro-1311
- Edgewater Park Twp.-0312
- Egg Harbor Twp-0108
- Elizabeth City- 2004
- Emerson Boro-0214
- Englewood City-0215
- Englewood Cliffs Boro-0216
- Ewing Twp.-1102
- Fair Haven Boro-1313
- Fairview Boro-0218
- Far Hills Boro-1807
- Florham Park Boro-1411
- Fort Lee Boro-0219
- Franklin Twp.-1808
- Franklin Twp.-2105
- Freehold Twp.-1316
- Frenchtown Boro-1011
- Galloway Twp-0111
- Gibbsboro Boro-0413
- Gloucester Twp.-0415
- Guttenberg Town-0903
- Hackensack City-0223
- Haddon Heights Boro-0418
- Haddon Twp.-0416
- Haddonfield Boro-0417
- Hamilton Twp.-1103
- Harding Twp.-1413
- Harrington Park Boro-0224
- Hasbrouck Heights-0225
- Haworth Boro-0226
- Hi-nella Boro-0419
- Hillside Twp.-2007
- Holmdel Twp.-1318
- Hopewell Twp.1106-
- Howell Twp.-1319
- Irvington Town-0709
- Jersey City-0906
- Keansburg Boro-1321
- Lakewood Twp.-1514
- Laurel Springs Boro-0420
- Lavalette Boro-1515
- Lawnside Boro-0421
- Lawrence Twp.-1107
- Leonia Boro-0229
- Lindenwold Boro-0422
- Linwood City-0114
- Little Falls Twp.-1605
- Little Ferry Boro-0230
- Little Silver Boro-1323
- Livingston Twp.-0710
- Long Branch City-1325
- Magnolia Boro-0423
- Maple Shade Twp.-0319
- Maplewood Twp.-0711
- Maywood Boro-0234
- Mendham Boro-1418
- Mendham Twp.-1419
- Middletown Twp.-1331
- Millburn Twp.-0712
- Monroe Twp.-1213
- Moonachie Boro-0237
- Moorestown Twp.-0322
- Mount Ephraim Boro-0425
- Mount Laurel Twp.-0324
- Mount Olive Twp.-1427
- Neptune City Boro-1335
- Neptune Twp.-1334
- New Milford Boro-0238
- New Providence Boro-2011
- Newark-0714
- North Bergen Twp.-0908
- North Caldwell Boro-0715
- Northfield City-0118
- Northvale Boro-0240
- Norwood Boro-0241
- Oaklyn Boro-0426
- Ocean City-0508
- Ocean Twp.-1337
- Oceanport Boro-1338
- Old Tappan Boro-0243
- Oradell Boro-0244
- Oxford Twp.-2117
- Palisades Park Boro-0245
- Palmyra Boro-0327
- Paramus Boro-0246
- Pennsauken Twp.-0427
- Pleasantville City-0119
- Red Bank Boro-1340
- Ridgefield Boro-0249
- Ridgefield Park Twp-0250
- River Edge Boro-0252
- River Vale Twp-0253
- Riverside Twp.-0330
- Riverton Boro-0331
- Rochelle Park Twp-0254
- Rockleigh Boro-0255
- Rumson Boro-1342
- Runnemede Boro-0430
- Rutherford Boro-0256
- Secaucus Town-0909
- Shrewsbury Boro-1345
- Somerdale Boro-0431
- Somers Point City-0121
- South Hackensack Twp-.0259
- South Orange Village-0719
- Springfield Twp.-2017
- Stratford Boro-0432
- Summit City-2018
- Teaneck Twp-.0260
- Tenafly Boro-0261
- Teterboro Boro-0262
- Tinton Falls-1336
- Toms River-1507
- Trenton City-1111
- Union Beach Boro-1350
- Union Twp-.2019
- Upper Saddle River-0263
- Voorhees Twp.-0434
- Warren Twp.-1820
- Washington Twp.-0266
- Weehawken Twp.-0911
- West Long Branch Boro-1353
- West New York Town-0912
- Westwood Boro-0267
- Wildwood City-0514
- Wood-ridge Boro-0269
- Woodbridge Twp.-1225