PFAS (Forever Chemicals) in Washington Well Water

EPA Data 2025 · Risk Level: Moderate

Avg Level

2.121 ppt

EPA Limit

4 ppt

% Above Limit

11.5%

Risk Level

moderate

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

Water Quality Details

Contaminant	PFAS (Forever Chemicals)
Category	chemical
Average Level	2.121 ppt
Maximum Level	8.233 ppt
EPA Limit (MCL)	4 ppt
% Wells Above Limit	11.5%
Affected Wells	55,200
Testing Cost	$47
Treatment Cost	$3,587
vs National Avg	+0.103 ppt (+5.1%)

Washington Well Water Overview

Well Users

480,000

% on Well Water

16.5%

Quality Score

76/100

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 Washington well water?

In Washington, pfas (forever chemicals) levels average 2.121 ppt, with a maximum recorded level of 8.233 ppt. The EPA limit is 4 ppt. Currently 11.5% of tested wells exceed this limit, affecting approximately 55,200 wells.

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

Testing for pfas (forever chemicals) in Washington typically costs around $47. If treatment is needed, water treatment systems for pfas (forever chemicals) cost approximately $3,587.

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

The risk level for pfas (forever chemicals) in Washington is rated as moderate. The state average of 2.121 ppt is 5.1% above the national average of 2.018 ppt.

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