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About & methodology

Name: Private Well Testing Act Summary Results by Municipality for New Jersey
Creator: New Jersey Department of Environmental Protection

Disclaimer. NJ Well Water is an independent site. It is not affiliated with, endorsed by, or speaking for the New Jersey Department of Environmental Protection (NJDEP) or any laboratory. The data shown is a summary of historical tests and may be outdated or incomplete. It describes past wells in a town, not the well at any particular property. Verify requirements, certifications and prices with NJDEP and the lab before you act. Nothing here is legal, medical, engineering or real-estate advice.

Where the numbers come from

Town results come from NJDEP's dataset Private Well Testing Act Summary Results by Municipality for New Jersey, retrieved 2026-10-21. NJDEP describes it as a summary of the percentage of wells in each municipality that exceeded a maximum contaminant level (MCL) or secondary standard, for September 2002 to December 2024. For each parameter the dataset gives a percentage and the number of wells sampled, or a note such as "Less than ten wells sampled" or "Testing not required under PWTA". We reproduce those values exactly as published, with no rounding, estimating or combining.

Towns ranked by wells tested: the dataset has no single "total wells" field, so we rank towns by the largest "wells sampled" count reported for any parameter. Towns where every parameter shows fewer than ten wells get no page.
Standards (for example 10 mg/L for nitrate) are quoted from NJDEP's category text in the same dataset.
Different counts per parameter are normal. Parameters were added at different times (for example PFAS in December 2021), and some apply only in certain counties.
Labs come from NJDEP's real-time DataMiner report "Laboratories Certified for PWTA Sample Collection", retrieved Oct 21, 2026. The report has no as-of date; its newest certification status date is Feb 2, 2026. "Nearby" means based in the same or a neighboring county.
Prices appear only where the lab publishes them, with a link and date.

Affiliate & advertising policy

Some pages have marked spaces reserved for future partners, such as water test kits or radon monitors. We have not joined any affiliate program yet, so those spaces contain no links. If that changes, links will be clearly disclosed and will never change the data.

Sources

Private Well Testing Act Summary Results by Municipality for New Jersey (NJDEP) (retrieved/accessed 2026-10-21)
Laboratories Certified for PWTA Sample Collection (NJDEP DataMiner) (retrieved/accessed 2026-10-21)
NJDEP Private Wells: Private Well Testing Act (PWTA) (retrieved/accessed 2026-10-21)
NJDEP Division of Science and Research: PWTA (lab sampling/testing rules) (retrieved/accessed 2026-10-21)
NJDEP Certified Laboratories (links to real-time DataMiner reports) (retrieved/accessed 2026-10-21)
Pace Analytical: Private Well Testing - NJ PWTA (parameter list and county requirements) (retrieved/accessed 2026-10-21)
NJ Department of Health: PFAS and private wells in New Jersey (updated July 2025) (retrieved/accessed 2026-10-21)
RAdata Water Testing (retrieved/accessed 2026-10-21)
EMSL New Jersey PWTA 2023 price sheet (retrieved/accessed 2026-10-21)
PWTA Laboratories Certified for Sampling, NJDEP report as of 6/30/2023 (superseded; copy hosted by Hopewell Township) (retrieved/accessed 2026-10-21)

Corrections

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