States ›California ›Shasta County ›Cottonwood

Cottonwood, CA Tap Water Quality 2026

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

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

Main Utility: Cottonwood Water District PWSID: CA4510007 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 1.07 ppb, 7% of the action level and no violations are open. No PFAS was detected.

A

Cottonwood earns an A for water quality

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

Lead: 1.07 ppb — 7% of the federal action level
PFAS tested, none detected
4 violations since 2015, 2 health-based
No violations currently open
Cottonwood's lead level vs. all California community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 1.07 ppb — 7% of the federal action level
✓ Lower lead than 87% of California utilities
Population Served
5695
~1235 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
4 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
7% of EPA action level
1.07 ppb
Action level: 15 ppb
The 90th-percentile lead result is 1.07 ppb, 7% 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
Lead and Copper Rule MONITORING AND REPORTING — TT 2025 Addressed
LEAD AND COPPER RULE REVISIONS TREATMENT TECHNIQUE — — 2024 Resolved
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2024 Resolved
Revised Total Coliform Rule TREATMENT TECHNIQUE — — 2018 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

4 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 Cottonwood Water District
PWSID CA4510007
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 5,695
Service connections 1,235
Systems serving this area 4
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Cottonwood tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 1.07 ppb, 7% of the action level.
Does Cottonwood water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Cottonwood? ▼
Cottonwood Water District (PWSID CA4510007), one of 4 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2022-05-05. No significant deficiencies were recorded.

What Should Cottonwood 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 California

Redding, Ca Tap Water Quality 2026 Shasta Anderson, Ca Tap Water Quality 2026 Shasta Shasta Lake, Ca Tap Water Quality 2026 Shasta Happy Valley, Ca Tap Water Quality 2026 Shasta Bella Vista, Ca Tap Water Quality 2026 Shasta Burney, Ca Tap Water Quality 2026 Shasta