Cohassett Beach, WA Tap Water Quality 2026

Water quality report for Cohassett Beach, WA — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Cohassett Beach's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Westport Water Department PWSID: WA5395300 Updated: 2026 Q2

✅

No federal limits exceeded on record

Lead is 2.90 ppb, 19% of the action level and no violations are open. No PFAS was detected.

Cohassett Beach earns a B for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 2.90 ppb — 19% of the federal action level

PFAS tested, none detected

12 violations since 2015, 4 health-based

No violations currently open

Cohassett Beach's lead level vs. all Washington community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: 2.90 ppb — 19% of the federal action level

✓ Lower lead than 35% of Washington utilities

Population Served

771

~3130 connections

Water Source

Groundwater

Drawn from wells — SDWIS source code GW

Active Violations

12 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

19% of EPA action level

2.90 ppb

Action level: 15 ppb

The 90th-percentile lead result is 2.90 ppb, 19% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

Contaminant	Type	Measured	Limit	Period	Status
Arsenic	MCL EXCEEDANCE	0.0113 MG/L	0.010 mg/L	2025	Archived
Arsenic	MCL EXCEEDANCE	0.012 MG/L	0.010 mg/L	2025	Archived
Arsenic	MCL EXCEEDANCE	0.0128 MG/L	0.010 mg/L	2024	Archived
Arsenic	MCL EXCEEDANCE	0.0133 MG/L	0.010 mg/L	2024	Archived
Arsenic	MONITORING AND REPORTING	—	0.010 mg/L	2023	Resolved
Arsenic	MONITORING AND REPORTING	—	0.010 mg/L	2021	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2017	Resolved
Dalapon	MONITORING AND REPORTING	—	0.2 mg/L	2017–2019	Resolved
Picloram	MONITORING AND REPORTING	—	0.5 mg/L	2017–2019	Resolved
Dinoseb	MONITORING AND REPORTING	—	0.007 mg/L	2017–2019	Resolved
2,4,5-TP	MONITORING AND REPORTING	—	0.05 mg/L	2017–2019	Resolved
Pentachlorophenol	MONITORING AND REPORTING	—	0.001 mg/L	2017–2019	Resolved

Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

12 violations are on record since 2015, of which 4 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Westport Water Department

PWSID WA5395300

Water source Groundwater — Drawn from wells — SDWIS source code GW

Population served 771

Service connections 3,130

Systems serving this area 1

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Cohassett Beach tap water safe to drink? ▼

No federal limit is exceeded on record. No violations are currently open. Lead is 2.90 ppb, 19% of the action level.

Does Cohassett Beach water have PFAS? ▼

It was tested for the six regulated PFAS compounds and none were detected.

Who supplies water to Cohassett Beach? ▼

Westport Water Department (PWSID WA5395300). Groundwater. Drawn from wells — SDWIS source code GW

When was this system last inspected? ▼

It was last inspected on 2021-06-11. No significant deficiencies were recorded.

What Should Cohassett Beach Residents Do?

Read your annual water report

Your supplier publishes a Consumer Confidence Report each July covering the prior year.

Check for a lead service line

Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.

Flush before drinking

If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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