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Big River, CA Tap Water Quality 2026

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

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

Main Utility: Big River Development PWSID: 090600226 Updated: 2026 Q2
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3 violations currently open

Lead is 2.70 ppb, 18% of the action level. PFAS has never been sampled at this system.

F

Big River earns an F for water quality

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

Lead: 2.70 ppb — 18% of the federal action level
PFAS never sampled at this system
30 violations since 2015, 3 health-based
3 violations currently open
Big River's lead level vs. all California community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 2.70 ppb — 18% of the federal action level
✓ Lower lead than 45% of California utilities
Population Served
480
~905 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
3
3 open of 30 since 2015

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
18% of EPA action level
2.70 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.
115.4% of EPA action level
1,500 ppb
Action level: 1,300 ppb
The 90th-percentile lead result is 2.70 ppb, 18% 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
Revised Total Coliform Rule REPORTING FAILURE — — 2025 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2025 Archived
Public Notice OTHER — — 2025 Unaddressed
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2025 Archived
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2025 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2025 Resolved
Public Notice OTHER — — 2025 Unaddressed
Nitrate MONITORING AND REPORTING — 10 mg/L 2025 Archived
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2025 Archived
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2025 Archived
TTHM MONITORING AND REPORTING — 0.080 mg/L 2025 Archived
TTHM MONITORING AND REPORTING — 0.080 mg/L 2025 Archived
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2024 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2024 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2024 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2024 Unaddressed
Public Notice OTHER — — 2024 Unaddressed
Public Notice OTHER — — 2024 Unaddressed
Public Notice OTHER — — 2024 Unaddressed
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2023 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2023 Unaddressed
Revised Total Coliform Rule REPORTING FAILURE — — 2022 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2022 Unaddressed
Gross Alpha, Excl. Radon and U MONITORING AND REPORTING — 15 pCi/L 2020–2025 Archived
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2020–2025 Archived
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2018 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2018 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2016 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2016 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2016 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 remain open, out of 30 recorded since 2015 (3 health-based).

About the Main Water System

Utility Big River Development
PWSID 090600226
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 480
Service connections 905
Systems serving this area 1
Regulator US EPA (tribal primacy)
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Big River tap water safe to drink? ▼
No federal limit is exceeded on record. 3 violation(s) remain open. Lead is 2.70 ppb, 18% of the action level.
Does Big River 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 Big River? ▼
Big River Development (PWSID 090600226). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2026-02-04. Inspectors recorded 3 significant deficiencies.

What Should Big River 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
Follow the open violation
This system has an unresolved violation. Contact the supplier for its corrective-action schedule.

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