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New Jersey Water Quality
361
Utilities in database
8.9M
Residents served
20%
On private wells
3
Key contaminants tracked
Drinking Water in New Jersey
New Jersey has 361 community water systems serving approximately 8.9 million residents. Primary water sources include groundwater. The most commonly reported contaminants include disinfection byproducts, lead, arsenic. 20% of New Jersey residents rely on private wells. DEP holds primary enforcement authority under the Safe Drinking Water Act.
Utilities in New Jersey
51–75 of 361Cape May Water & Sewer U
NJ0502001 · 35,000 served
Willingboro Mua
NJ0338001 · 35,000 served
Edison Water Co
NJ1205001 · 35,000 served
Fair Lawn Water Dept
NJ0217001 · 34,947 served
Stone Harbor Water Dept
NJ0510001 · 30,850 served
Stafford Twp Water - Beach Haven West
NJ1530004 · 30,603 served
Deptford Twp Mua
NJ0802001 · 30,561 served
Garfield Water Department
NJ0221001 · 30,487 served
Orange Water Dept
NJ0717001 · 30,134 served
Freehold Twp Water Dept
NJ1316001 · 29,831 served
Nutley Water Dept
NJ0716001 · 29,500 served
Marlboro Township Water Utility Division
NJ1328002 · 29,480 served
Lacey Twp Mua
NJ1512001 · 29,000 served
Dover Water Commission
NJ1409001 · 27,806 served
Lakewood Twp Mua
NJ1514002 · 27,614 served
Millville Water Department
NJ0610001 · 27,500 served
Livingston Twp Div of Water
NJ0710001 · 27,391 served
Rahway Water Department
NJ2013001 · 27,300 served
Mahwah Water Department
NJ0233001 · 26,777 served
Aqua Nj - Phillipsburg
NJ2119001 · 26,686 served
Monroe Municipal Utilities Authority
NJ0811002 · 26,179 served
Wall Twp Water Dept
NJ1352003 · 26,000 served
Long Beach Twp Brant Bea
NJ1517001 · 25,295 served
Lavallette Water Dept
NJ1515001 · 25,000 served
East Windsor Mua
NJ1101002 · 25,000 served
Key Contaminant Concerns in New Jersey
Lead
Lead is a naturally occurring heavy metal that was widely used in plumbing infrastructure until it was banned for new installations in 1986. An estimated 9.2 million lead service lines still connect homes to public water mains across the United States, along with millions of homes with lead solder in their internal plumbing.
DBPs
When utilities add chlorine to water to kill pathogens, it reacts with dissolved organic matter — leaves, algae, soil — to produce disinfection byproducts (DBPs). Over 600 DBPs have been identified. The EPA regulates two groups: total trihalomethanes (TTHMs, including chloroform) and haloacetic acids (HAA5). DBP levels tend to be highest in surface water systems and in warm months when organic matter is elevated.
Arsenic
Arsenic (As) occurs naturally in rock and soil, dissolving into groundwater through natural weathering processes. Inorganic arsenic — the form found in drinking water — is a known human carcinogen. The western United States has particularly arsenic-rich geological formations, but elevated levels have been found in 48 states. Arsenic is tasteless and odorless.
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Data source: Utility data from EPA SDWIS. 361 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-18