MyCleanWater

Lewistown, Montana Water Quality Report

Water quality data for 5 water systems serving 6,178 people.

95
Excellent
out of 100

Water Source

5
Water Systems
6K
People Served
Ground water
Water Source

Detected Contaminants

No contaminant data available for this location.

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Compliance & Violations

Active Violations (2)

66

Dec 30, 2024

moderate

71

Jul 1, 2024

minor

Resolved Violations (498)

01

Oct 1, 2025 — Dec 31, 2025

critical

01

Oct 1, 2025 — Dec 31, 2025

critical

01

Oct 1, 2025 — Dec 31, 2025

critical

01

Oct 1, 2025 — Dec 31, 2025

critical

01

Oct 1, 2025 — Dec 31, 2025

critical

+ 493 more resolved violations

Frequently Asked Questions

Is Lewistown tap water safe to drink?

Lewistown's water meets all EPA maximum contaminant levels. However, 0 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.

What contaminants are in Lewistown tap water?

0 contaminants have been detected in Lewistown's water supply across 5 water systems. See the full contaminant table above for details.

How can I improve my water quality in Lewistown?

Install a water filter rated for the specific contaminants found in Lewistown's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.

Does Lewistown have any water quality violations?

Yes, Lewistown currently has 11 active violations. See the violations section above for details.