Lead in Montana Well Water

EPA Data 2025 · Risk Level: Low

Avg Level

4.351 ppb

EPA Limit

15 ppb

% Above Limit

6.8%

Risk Level

low

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

Water Quality Details

Contaminant	Lead
Category	metal
Average Level	4.351 ppb
Maximum Level	17.08 ppb
EPA Limit (MCL)	15 ppb
% Wells Above Limit	6.8%
Affected Wells	12,240
Testing Cost	$106
Treatment Cost	$1,803
vs National Avg	-1.845 ppb (-29.8%)

Montana Well Water Overview

Well Users

180,000

% on Well Water

28.2%

Quality Score

76/100

Highest Risk States for Lead

#1Louisiana19.1% above limit #2West Virginia18.8% above limit #3Indiana16.7% above limit #4Maine13.8% above limit #5Tennessee13.8% 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 lead a problem in Montana well water?

In Montana, lead levels average 4.351 ppb, with a maximum recorded level of 17.08 ppb. The EPA limit is 15 ppb. Currently 6.8% of tested wells exceed this limit, affecting approximately 12,240 wells.

How much does it cost to test for lead in Montana?

Testing for lead in Montana typically costs around $106. If treatment is needed, water treatment systems for lead cost approximately $1,803.

What is the risk level of lead in Montana well water?

The risk level for lead in Montana is rated as low. The state average of 4.351 ppb is 29.8% below the national average of 6.196 ppb.

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