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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
151–175 of 361Totowa W Dept
NJ1612001 · 10,804 served
Beachwood Water Dept
NJ1504001 · 10,802 served
Longport Water Department
NJ0115001 · 10,777 served
West Caldwell Water Department
NJ0721001 · 10,759 served
Nj American Water - Washington/oxford
NJ2121001 · 10,719 served
Wanaque W Dept.
NJ1613002 · 10,266 served
Woodbury City W Dept
NJ0822001 · 10,263 served
Pine Hill Borough Mua
NJ0428002 · 10,233 served
Waldwick Water Dept
NJ0264001 · 10,208 served
Keansburg Water & Sewer Dept.
NJ1321001 · 10,105 served
Surf City Water Dept
NJ1531001 · 10,000 served
East Greenwich Twp Water Dept
NJ0803001 · 9,900 served
Burlington City Water De
NJ0305001 · 9,835 served
Boonton Water Dept
NJ1401001 · 9,532 served
Bellmawr Water Dept
NJ0404001 · 9,522 served
Ringwood Water Department
NJ1611002 · 9,327 served
Nj American Water - Harrison
NJ0808001 · 9,193 served
Matawan Borough Water De
NJ1329001 · 9,084 served
Caldwell Water Dept
NJ0703001 · 9,027 served
Chatham Water Dept
NJ1404001 · 8,962 served
Florham Park Water Dept
NJ1411001 · 8,846 served
Manalapan Twp - Knob Hill
NJ1326002 · 8,700 served
Aqua Nj - Lawrence
NJ1107002 · 8,655 served
Jefferson Twp W U Lk Hop
NJ1414011 · 8,500 served
Newton Water & Sewer Utility
NJ1915001 · 8,300 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