New Jersey Water Quality 2026: Contamination Guide

New Jersey has 14 contaminants above independent health guidelines in its tap water — among the worst in the northeast. PFAS "forever chemicals" from Joint Base McGuire-Dix-Lakehurst and other military installations have contaminated groundwater statewide. Homes built before 1986 face lead exposure from aging service lines. New Jersey is also the most densely populated U.S. state, which means industrial contamination has nowhere to go.

The Garden State's water story is complicated. New Jersey has some of the strictest water quality regulations in the country — the state set its own PFAS standards before the EPA did. But regulations don't equal clean water. Decades of industrial chemistry, military activity, and aging infrastructure have left a measurable impact on tap water across all 21 counties.

PFAS Contamination — Among the Worst in America

New Jersey has one of the highest concentrations of PFAS contamination in the United States. Major sources:

• Joint Base McGuire-Dix-Lakehurst (Burlington County): Decades of firefighting foam use
• Naval Weapons Station Earle (Monmouth County)
• Picatinny Arsenal (Morris County)
• Solvay Specialty Polymers (Gloucester County): Industrial PFAS manufacturer
• DuPont Chambers Works (Salem County): Legacy contamination

The New Jersey Department of Environmental Protection (NJDEP) has set some of the strictest PFAS drinking water standards in the nation:

• PFOA: 14 parts per trillion
• PFOS: 13 parts per trillion
• PFNA: 13 parts per trillion

Many public water systems still exceed these limits while working toward compliance. Private well users face even greater risks, as wells near contamination sites routinely test well above state limits.

Lead Service Lines in Older Cities

New Jersey has over 160,000 lead service lines still in use — among the most of any state. Newark made national headlines in 2018-2019 when tap water in thousands of homes tested above federal lead limits. Since then:

• Newark replaced over 23,000 lead service lines (the most aggressive program in the nation)
• Trenton, Jersey City, Elizabeth, and Paterson continue their own replacement programs
• Many smaller communities haven't started

If your New Jersey home was built before 1986, lead plumbing is possible. The EPA estimates health effects from lead exposure include learning disabilities in children, cardiovascular disease in adults, and kidney damage.

Disinfection Byproducts — Cancer-Linked

New Jersey water utilities use chlorine to disinfect drinking water. When chlorine reacts with organic material in rivers and reservoirs (Wanaque, Round Valley, Spruce Run), it forms trihalomethanes (TTHMs) and haloacetic acids — both probable human carcinogens.

The Environmental Working Group estimates TTHM exposure in some New Jersey communities is 400x higher than health-based guidelines. The EPA's legal limit (80 ppb) hasn't been updated since 1998.

Hard Water Across the State

New Jersey water averages 190 PPM of hardness (11.1 grains per gallon) — classified as hard water. County-specific variations:

• Hunterdon, Warren: 200-250 PPM (very hard, well water)
• Middlesex, Somerset: 180-200 PPM
• Passaic, Bergen: 150-180 PPM (Wanaque Reservoir)
• Essex, Union: 170-200 PPM
• Monmouth, Ocean: 140-180 PPM (Shrewsbury Aquifer)

Hard water damages water heaters, washing machines, dishwashers, and plumbing. It also reacts with soap to leave residue on skin and hair, and makes cleaning dishes and surfaces harder.

Nitrates and Agricultural Contamination

South Jersey's extensive agriculture (blueberries, cranberries, peaches, corn) means nitrate contamination is common in rural wells. Burlington, Gloucester, Cumberland, and Atlantic counties have documented nitrate issues. Infants are most at risk — high nitrates can cause "blue baby syndrome."

Private Wells in Rural Counties

Approximately 1 million New Jersey residents rely on private wells — especially in Hunterdon, Warren, Sussex, and southern counties. NJDEP requires testing when a well is drilled, but ongoing testing is the homeowner's responsibility.

Common private well issues in New Jersey:

• Nitrates (agricultural runoff)
• Bacteria (coliform, E. coli)
• Arsenic (naturally occurring in Piedmont geology)
• Radon gas
• Iron, manganese, and sulfur
• PFAS (near known contamination sites)

How to Protect Your NJ Home

New Jersey's combination of PFAS, lead, hardness, chlorine, and regional variations means no single off-the-shelf filter solves everything.

For city water: A whole-house system with PFAS-specific carbon filtration + softening + lead reduction. This protects every tap, every shower, every appliance.

For well water: More customized — typically sediment filtration + iron/sulfur removal + softening + PFAS carbon + UV disinfection for bacteria.

For drinking water only: Under-sink reverse osmosis at the kitchen sink removes 95%+ of contaminants. Doesn't protect shower water.

The most effective solution for most NJ homes is whole-house treatment. Shower water matters — skin absorbs PFAS and chlorine, and inhaling chlorine vapor during hot showers concentrates exposure.

Free Water Test for Your NJ Home

The only way to know what's actually in your tap water is a home test. Aquaworld Alkalino provides free on-site water testing across New Jersey. A certified technician tests water at your tap and shows results on the spot. See our New Jersey service area.

Frequently Asked Questions

Is New Jersey tap water safe to drink?

New Jersey tap water meets federal EPA standards, but has 14 contaminants above independent health guidelines. PFAS contamination is widespread, over 160,000 lead service lines remain in use, and disinfection byproducts (linked to cancer) exceed health-based limits in many communities.

Is Newark water safe after the lead crisis?

Newark replaced over 23,000 lead service lines between 2019-2022 and its tap water now tests below federal lead limits. However, homes with internal lead plumbing (not the service line) may still face exposure. Testing is recommended.

Where is PFAS in New Jersey?

PFAS contamination has been documented across all 21 NJ counties, with the worst concentrations near Joint Base McGuire-Dix-Lakehurst, Naval Weapons Station Earle, Picatinny Arsenal, and former industrial sites in South Jersey (Solvay, DuPont).

How hard is New Jersey water?

New Jersey water averages 190 PPM (11.1 grains per gallon) — classified as hard water. Rural counties with well water (Hunterdon, Warren) often exceed 200 PPM. Hard water damages appliances and causes scale buildup.

Do I need a water filter if I live in NJ?

Given PFAS contamination, lead service lines, and disinfection byproducts, most New Jersey homeowners benefit from some form of water treatment. The right system depends on whether you have city or well water. Schedule a free water test in NJ.