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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
326–350 of 361Manalapan Twp Wd Tracy Station
NJ1326007 · 800 served
Township of Blairstown Dpw
NJ2104001 · 800 served
Bayview Water System
NJ0604001 · 771 served
Hardyston Twp Mua
NJ1911005 · 769 served
The Oaks of Weymouth Water Co.
NJ0123002 · 750 served
Mount Olive Twp W D Sand
NJ1427006 · 744 served
Middle Twp Water District
NJ0506009 · 731 served
Weymouth Twsp Mua
NJ0123001 · 720 served
Mobile Estates of Southa
NJ0333002 · 700 served
Veolia Water New Jersey - Crescent Park
NJ1615014 · 700 served
Rocky Hill W Dept
NJ1817001 · 687 served
Middle Twp Water District 1
NJ0506008 · 685 served
Veolia Water New Jersey Montvale Pd95
NJ0236001 · 654 served
Stockton Water Department
NJ1023001 · 650 served
Grande Woods South Mobile H P
NJ0506007 · 650 served
Fieldsboro Water Department
NJ0314001 · 650 served
Pemberton Twp Water Dept - Pemberton Hei
NJ0329009 · 650 served
Mt Olive Twp Wd Pinecrest
NJ1427008 · 648 served
Veolia Water New Jersey Colts Neck
NJ1309002 · 640 served
Veolia Water New Jersey - Awosting
NJ1615012 · 633 served
South Wind Mobile Home V
NJ1511008 · 625 served
Aqua Nj - Riegel Ridge
NJ1015003 · 621 served
Veolia Water New Jersey East Brookwood
NJ1904002 · 612 served
Andover Boro Water Dept
NJ1901001 · 606 served
Veolia Water Nj Greenbrook Estates
NJ1615002 · 600 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