Arsenic in Kentucky Well Water

EPA Data 2025 · Risk Level: Low

Avg Level

4.117 ppb

EPA Limit

10 ppb

% Above Limit

7.6%

Risk Level

low

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

Water Quality Details

Contaminant	Arsenic
Category	chemical
Average Level	4.117 ppb
Maximum Level	13.098 ppb
EPA Limit (MCL)	10 ppb
% Wells Above Limit	7.6%
Affected Wells	28,880
Testing Cost	$149
Treatment Cost	$3,042
vs National Avg	-0.126 ppb (-3.0%)

Kentucky Well Water Overview

Well Users

380,000

% on Well Water

16.5%

Quality Score

63/100

Highest Risk States for Arsenic

#1Iowa17.4% above limit #2Georgia15.8% above limit #3Missouri15.8% above limit #4Alabama15.4% above limit #5Colorado14.0% 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 arsenic a problem in Kentucky well water?

In Kentucky, arsenic levels average 4.117 ppb, with a maximum recorded level of 13.098 ppb. The EPA limit is 10 ppb. Currently 7.6% of tested wells exceed this limit, affecting approximately 28,880 wells.

How much does it cost to test for arsenic in Kentucky?

Testing for arsenic in Kentucky typically costs around $149. If treatment is needed, water treatment systems for arsenic cost approximately $3,042.

What is the risk level of arsenic in Kentucky well water?

The risk level for arsenic in Kentucky is rated as low. The state average of 4.117 ppb is 3.0% below the national average of 4.243 ppb.

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