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Laytonville, CA Tap Water Quality 2026

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

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

Main Utility: Original Sherwood Valley Rancheria PWSID: 090605021 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 5.00 ppb, 33% of the action level and no violations are open. PFAS has never been sampled at this system.

D

Laytonville earns a D for water quality

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

Lead: 5.00 ppb — 33% of the federal action level
PFAS never sampled at this system
8 violations since 2015, 2 health-based
No violations currently open
Laytonville's lead level vs. all California community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 5.00 ppb — 33% of the federal action level
✓ Lower lead than 18% of California utilities
Population Served
236
~16 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
8 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
33% of EPA action level
5.00 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.
141.9% of EPA action level
1,845 ppb
Action level: 1,300 ppb
The 90th-percentile lead result is 5.00 ppb, 33% 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
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2024 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2023 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2022 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2022 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2022 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2021 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2021 Resolved
Revised Total Coliform Rule MCL EXCEEDANCE — — 2021 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

8 violations are on record since 2015, of which 2 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Original Sherwood Valley Rancheria
PWSID 090605021
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 236
Service connections 16
Systems serving this area 2
Regulator US EPA (tribal primacy)
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Laytonville tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 5.00 ppb, 33% of the action level.
Does Laytonville 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 Laytonville? ▼
Original Sherwood Valley Rancheria (PWSID 090605021), one of 2 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2025-07-22. Inspectors recorded 4 significant deficiencies.

What Should Laytonville 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
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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