PFAS (Forever Chemicals) in Wisconsin Well Water

EPA Data 2025 · Risk Level: Moderate

Avg Level

2.816 ppt

EPA Limit

4 ppt

% Above Limit

9.3%

Risk Level

moderate

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

Water Quality Details

Contaminant	PFAS (Forever Chemicals)
Category	chemical
Average Level	2.816 ppt
Maximum Level	8.697 ppt
EPA Limit (MCL)	4 ppt
% Wells Above Limit	9.3%
Affected Wells	72,540
Testing Cost	$147
Treatment Cost	$4,099
vs National Avg	+0.798 ppt (+39.5%)

Wisconsin Well Water Overview

Well Users

780,000

% on Well Water

22.5%

Quality Score

72/100

Highest Risk States for PFAS (Forever Chemicals)

#1Oklahoma18.4% above limit #2Louisiana17.1% above limit #3New Mexico14.6% above limit #4West Virginia14.3% above limit #5South Dakota14.1% 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 pfas (forever chemicals) a problem in Wisconsin well water?

In Wisconsin, pfas (forever chemicals) levels average 2.816 ppt, with a maximum recorded level of 8.697 ppt. The EPA limit is 4 ppt. Currently 9.3% of tested wells exceed this limit, affecting approximately 72,540 wells.

How much does it cost to test for pfas (forever chemicals) in Wisconsin?

Testing for pfas (forever chemicals) in Wisconsin typically costs around $147. If treatment is needed, water treatment systems for pfas (forever chemicals) cost approximately $4,099.

What is the risk level of pfas (forever chemicals) in Wisconsin well water?

The risk level for pfas (forever chemicals) in Wisconsin is rated as moderate. The state average of 2.816 ppt is 39.5% above the national average of 2.018 ppt.

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