States ›Washington ›San Juan County ›Roche Harbor

Roche Harbor, WA Tap Water Quality 2026

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

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

Main Utility: Roche Harbor Water System Inc PWSID: WA5373230 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 3.30 ppb, 22% of the action level and no violations are open. PFAS has never been sampled at this system.

B

Roche Harbor earns a B for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: 3.30 ppb — 22% of the federal action level
PFAS never sampled at this system
3 violations since 2015, 0 health-based
No violations currently open
Roche Harbor's lead level vs. all Washington community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 3.30 ppb — 22% of the federal action level
✓ Lower lead than 24% of Washington utilities
Population Served
436
~630 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
3 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
22% of EPA action level
3.30 ppb
Action level: 15 ppb
Copper (Cu)
90th percentile of tap samples. SDWIS reports a copper figure only when a system exceeds the action level, so any value here is an exceedance.
106.9% of EPA action level
1,390 ppb
Action level: 1,300 ppb
The 90th-percentile lead result is 3.30 ppb, 22% 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. Copper reached the action level here; a copper figure appears in SDWIS only when a system triggers it.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2026 Archived
TTHM MONITORING AND REPORTING — 0.080 mg/L 2026 Archived
Surface Water Treatment Rule MONITORING AND REPORTING — — 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

3 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Roche Harbor Water System Inc
PWSID WA5373230
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 436
Service connections 630
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Roche Harbor tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 3.30 ppb, 22% of the action level.
Does Roche Harbor water have PFAS? ▼
This system has never been sampled for PFAS. EPA's national monitoring covered systems serving 3,300 people or more, so no results exist — which is not evidence that none is present.
Who supplies water to Roche Harbor? ▼
Roche Harbor Water System Inc (PWSID WA5373230), one of 2 systems serving this area. Surface water. Drawn from surface water — SDWIS source code SW
When was this system last inspected? ▼
It was last inspected on 2025-09-25. No significant deficiencies were recorded.

What Should Roche Harbor Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
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.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

Nearby Cities in Washington

Friday Harbor, Wa Tap Water Quality 2026 San Juan