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Washington, CA Tap Water Quality 2026

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

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

Main Utility: Washington Water District PWSID: CA2900523 Updated: 2026 Q2
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Lead above the federal action level

Lead is 41.40 ppb, 276% of the action level. PFAS has never been sampled at this system.

F

Washington earns an F for water quality

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

Lead: 41.40 ppb — 276% of the federal action level
PFAS never sampled at this system
8 violations since 2015, 1 health-based
1 violation currently open
Washington's lead level vs. all California community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 41.40 ppb — 100% of the federal action level
✓ Lower lead than 0% of California utilities
Population Served
100
~115 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
1
1 open of 8 since 2015

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
100% of EPA action level
41.40 ppb
Action level: 15 ppb
The 90th-percentile lead result is 41.40 ppb, 276% 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)

ContaminantTypeMeasuredLimitPeriodStatus
Nitrate MONITORING AND REPORTING — 10 mg/L 2025 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2025 Archived
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2025 Archived
LEAD AND COPPER RULE REVISIONS TREATMENT TECHNIQUE — — 2024 Unaddressed
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2024 Unaddressed
Nitrate MONITORING AND REPORTING — 10 mg/L 2020 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2020 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2020 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

1 violation remains open, out of 8 recorded since 2015 (1 health-based).

About the Main Water System

Utility Washington Water District
PWSID CA2900523
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 100
Service connections 115
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Washington tap water safe to drink? ▼
No federal limit is exceeded on record. 1 violation(s) remain open. Lead is 41.40 ppb, 276% of the action level.
Does Washington 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 Washington? ▼
Washington Water District (PWSID CA2900523). Surface water. Drawn from surface water — SDWIS source code SW
When was this system last inspected? ▼
It was last inspected on 2024-09-16. No significant deficiencies were recorded.

What Should Washington Residents Do?

1
Consider a filter certified for lead
Look for NSF/ANSI 53 certification for lead reduction.
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
Follow the open violation
This system has an unresolved violation. Contact the supplier for its corrective-action schedule.

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