MyCleanWater

Issaquah, Washington Water Quality Report

Water quality data for 4 water systems serving 43,739 people.

90
Excellent
out of 100

Water Source

4
Water Systems
44K
People Served
Surface water, Ground water
Water Source

Detected Contaminants

No contaminant data available for this location.

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Compliance & Violations

Active Violations (3)

52

Jan 1, 2022

moderate

71

Jul 1, 2019

minor

71

Jul 1, 2018

minor

Resolved Violations (497)

71

Jul 1, 2024

minor

03

Jan 1, 2024 — Dec 31, 2024

moderate

03

Jan 1, 2023 — Dec 31, 2023

moderate

3A

May 1, 2020 — May 31, 2020

minor

3A

Apr 1, 2020 — Apr 30, 2020

minor

+ 492 more resolved violations

Frequently Asked Questions

Is Issaquah tap water safe to drink?

Issaquah'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 Issaquah tap water?

0 contaminants have been detected in Issaquah's water supply across 4 water systems. See the full contaminant table above for details.

How can I improve my water quality in Issaquah?

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

Does Issaquah have any water quality violations?

Yes, Issaquah currently has 28 active violations. See the violations section above for details.