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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
Top 20 of 361 by populationVeolia Water New Jersey Hackensack
NJ0238001 · 792,713 served
Nj American Water - Raritan
NJ2004002 · 615,430 served
Nj American Water - Coastal North
NJ1345001 · 377,613 served
Passaic Valley Water Commission
NJ1605002 · 310,483 served
Newark Water Department
NJ0714001 · 294,274 served
Nj American Water - Western
NJ0327001 · 274,291 served
Jersey City Mua
NJ0906001 · 262,000 served
Middlesex Water Company
NJ1225001 · 233,376 served
Wildwood City Water Department
NJ0514001 · 218,472 served
Nj American Water - Short Hills
NJ0712001 · 217,230 served
Trenton Water Works
NJ1111001 · 217,000 served
Atlantic City Mua
NJ0102001 · 152,415 served
Nj American Water - Liberty
NJ2004001 · 134,000 served
Nj American Water - Ocean City
NJ0508001 · 127,000 served
Veolia Water New Jersey Toms River
NJ1507005 · 123,184 served
Nj American Water - Atlantic County
NJ0119002 · 120,146 served
Brick Township Mua
NJ1506001 · 86,898 served
East Orange Water Commission
NJ0705001 · 75,000 served
Old Bridge Mua
NJ1209002 · 68,000 served
City of Bayonne
NJ0901001 · 63,000 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.
New Jersey Water FAQs
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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