MyCleanWater

Nampa, Idaho Water Quality Report

Water quality data for 53 water systems serving 104,969 people.

85
Good
out of 100

Water Source

53
Water Systems
105K
People Served
Ground water
Water Source

Detected Contaminants

ContaminantDetected LevelEPA Limit (MCL)Health Guideline% of LimitStatus
lithium42.1 No federal limit10.0 ug/L(EPA/USGS HBSL)
421%
Above guideline

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Compliance & Violations

Active Violations (47)

4H

Jul 2, 2025

minor

4H

Jul 2, 2025

minor

4H

Jul 2, 2025

minor

4H

Jul 2, 2025

minor

4H

Jul 2, 2025

minor

4H

Jul 2, 2025

minor

4H

Jul 2, 2025

minor

4H

Jul 2, 2025

minor

4H

Jul 2, 2025

minor

4H

Jul 2, 2025

minor

4H

Jul 2, 2025

minor

4H

Jul 2, 2025

minor

75

Mar 3, 2025

minor

75

Mar 3, 2025

minor

75

Jan 3, 2025

minor

75

Jan 3, 2025

minor

66

Dec 30, 2024

moderate

66

Dec 30, 2024

moderate

75

Nov 26, 2024

minor

75

Nov 26, 2024

minor

20

Nov 25, 2024

minor

20

Nov 25, 2024

minor

52

Oct 1, 2024

moderate

52

Oct 1, 2024

moderate

34

Apr 3, 2024

moderate

34

Apr 3, 2024

moderate

34

Jan 12, 2024

moderate

34

Jan 12, 2024

moderate

66

Dec 30, 2023

moderate

66

Dec 30, 2023

moderate

75

Sep 22, 2023

minor

75

Sep 22, 2023

minor

20

Apr 27, 2023

minor

20

Apr 27, 2023

minor

34

Apr 20, 2023

moderate

34

Apr 20, 2023

moderate

66

Dec 30, 2022

moderate

66

Dec 30, 2022

moderate

66

Dec 30, 2021

moderate

66

Dec 30, 2021

moderate

Violation

Unknown

minor

Violation

Unknown

minor

Violation

Unknown

minor

Violation

Unknown

minor

Violation

Unknown

minor

Violation

Unknown

minor

Violation

Unknown

minor

Resolved Violations (537)

3A

Aug 1, 2025 — Aug 31, 2025

minor

34

Jul 17, 2025

moderate

34

Jul 17, 2025

moderate

34

Jul 17, 2025

moderate

3A

Jul 1, 2025 — Jul 31, 2025

minor

+ 532 more resolved violations

Frequently Asked Questions

Is Nampa tap water safe to drink?

Nampa's water meets all EPA maximum contaminant levels. However, 1 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.

What contaminants are in Nampa tap water?

1 contaminants have been detected in Nampa's water supply across 53 water systems. See the full contaminant table above for details.

How can I improve my water quality in Nampa?

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

Does Nampa have any water quality violations?

Yes, Nampa currently has 140 active violations. See the violations section above for details.