MyCleanWater

Coupeville, Washington Water Quality Report

Water quality data for 110 water systems serving 25,056 people.

60
Fair
out of 100

Water Source

110
Water Systems
25K
People Served
Ground water
Water Source

Detected Contaminants

ContaminantDetected LevelEPA Limit (MCL)Health Guideline% of LimitStatus
PFBA0.005 No federal limit1000.0 ug/L(EWG)
0%
Below guideline
PFBS0.007 No federal limit2000.0 ug/L(EPA Health Advisory)
0%
Below guideline
PFHpA0.003 No federal limit1000.0 ug/L(EWG)
0%
Below guideline
PFHxA0.017 No federal limit1000.0 ug/L(EWG)
0%
Below guideline
PFHxS0.004 0.010 ug/L0.001 ug/L(EWG)
38%
Within limit
PFOA0.010 0.004 ug/L0.090 ug/L(EWG)
245%
Above limit
PFPeA0.012 No federal limit1000.0 ug/L(EWG)
0%
Below guideline

Recommended Water Filters

Based on the contaminants detected in your water supply, these filtration systems are recommended:

Reverse Osmosis (RO)

Reverse osmosis systems remove up to 99% of PFAS compounds. Recommended for homes with detected PFAS.

Up to 99% PFAS removal

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Compliance & Violations

Active Violations (17)

71

Jul 1, 2025

minor

71

Jul 1, 2025

minor

71

Jul 1, 2025

minor

71

Jul 1, 2025

minor

71

Jul 1, 2025

minor

51

Jul 1, 2024

moderate

51

Jan 1, 2024

moderate

52

Jan 1, 2024

moderate

52

Jan 1, 2022

moderate

52

Jan 1, 2022

moderate

52

Jan 1, 2022

moderate

52

Jan 1, 2022

moderate

52

Jan 1, 2022

moderate

52

Jan 1, 2022

moderate

52

Jan 1, 2022

moderate

52

Jan 1, 2022

moderate

52

Jan 1, 2022

moderate

Resolved Violations (983)

71

Jul 1, 2025

minor

71

Jul 1, 2025

minor

71

Jul 1, 2025

minor

03

Jul 1, 2025 — Sep 30, 2025

moderate

71

Jul 1, 2025

minor

+ 978 more resolved violations

Frequently Asked Questions

Is Coupeville tap water safe to drink?

Coupeville's water has 1 contaminant detected above EPA limits. While the water is treated, residents may want to consider additional filtration.

What contaminants are in Coupeville tap water?

7 contaminants have been detected in Coupeville's water supply across 110 water systems. See the full contaminant table above for details.

How can I improve my water quality in Coupeville?

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

Does Coupeville have any water quality violations?

Yes, Coupeville currently has 199 active violations. See the violations section above for details.