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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
26–50 of 361Perth Amboy Water Department
NJ1216001 · 52,328 served
Hoboken Water Utility
NJ0905001 · 52,000 served
Parsippany-troy Hills Water Department
NJ1429001 · 50,400 served
East Brunswick Water Utility
NJ1204001 · 48,474 served
Washington Township Mua
NJ0818004 · 48,000 served
Nj American Water - Mount Holly
NJ0323001 · 47,427 served
Bloomfield Water Department
NJ0702001 · 47,315 served
Merchantville Pennsauken
NJ0424001 · 47,144 served
City of Camden
NJ0408001 · 46,585 served
Gordons Corner Water Co
NJ1326001 · 46,196 served
Evesham Mua
NJ0313001 · 45,538 served
South Brunswick Twp W Di
NJ1221004 · 45,450 served
Sayreville W Dept
NJ1219001 · 45,345 served
Aqua Nj - Blackwood
NJ0415002 · 44,396 served
North Brunswick W Dept
NJ1215001 · 43,905 served
Mt Laurel Twp Mua
NJ0324001 · 41,743 served
Kearny Water Department
NJ0907001 · 41,664 served
Montclair Water Bureau
NJ0713001 · 40,150 served
Avalon Water and Sewerage Utilities
NJ0501001 · 39,839 served
Winslow Twp Dmu
NJ0436007 · 39,174 served
Aqua Nj - Hamilton Square
NJ1103001 · 39,128 served
Jackson Twp Mua
NJ1511001 · 37,224 served
Vineland Water & Sewer Utility
NJ0614003 · 36,250 served
Monroe Twp Utility Department
NJ1213002 · 36,000 served
Belleville Water Dept
NJ0701001 · 35,129 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