Radon in New Jersey Well Water

EPA Data 2025 · Risk Level: Moderate

Avg Level

117.762 pCi/L

EPA Limit

300 pCi/L

% Above Limit

11.5%

Risk Level

moderate

Live DataLast updated: April 4, 2026·Source: EPA SDWIS & USGS

Water Quality Details

Contaminant	Radon
Category	radiological
Average Level	117.762 pCi/L
Maximum Level	331.805 pCi/L
EPA Limit (MCL)	300 pCi/L
% Wells Above Limit	11.5%
Affected Wells	43,700
Testing Cost	$97
Treatment Cost	$2,745
vs National Avg	-20.280 pCi/L (-14.7%)

New Jersey Well Water Overview

Well Users

380,000

% on Well Water

10.2%

Quality Score

73/100

Highest Risk States for Radon

#1Kentucky17.2% above limit #2Arkansas16.3% above limit #3Louisiana15.6% above limit #4South Dakota14.4% above limit #5Georgia14.3% above limit

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EPA SDWIS & USGS

📊

WellWaterPeek Research TeamData Specialists

Our team analyzes data from EPA SDWIS & USGS to deliver accurate, up-to-date information. All data is verified and cross-referenced with official sources.

✓ EPA SDWIS & USGS✓ Updated 2025

Frequently Asked Questions

Is radon a problem in New Jersey well water?

In New Jersey, radon levels average 117.762 pCi/L, with a maximum recorded level of 331.805 pCi/L. The EPA limit is 300 pCi/L. Currently 11.5% of tested wells exceed this limit, affecting approximately 43,700 wells.

How much does it cost to test for radon in New Jersey?

Testing for radon in New Jersey typically costs around $97. If treatment is needed, water treatment systems for radon cost approximately $2,745.

What is the risk level of radon in New Jersey well water?

The risk level for radon in New Jersey is rated as moderate. The state average of 117.762 pCi/L is 14.7% below the national average of 138.042 pCi/L.

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