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Tancred, CA Tap Water Quality 2026

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

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

Main Utility: Yocha Dehe Potable Water System PWSID: 090605107 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 5.00 ppb, 33% of the action level and no violations are open. No PFAS was detected.

C

Tancred earns a C for water quality

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

Lead: 5.00 ppb — 33% of the federal action level
PFAS tested, none detected
17 violations since 2015, 0 health-based
No violations currently open
Tancred'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
41
~56 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
17 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.
107.7% of EPA action level
1,400 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
Gross Alpha, Excl. Radon and U MONITORING AND REPORTING — 15 pCi/L 2023 Resolved
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2023 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2023 Resolved
Endrin MONITORING AND REPORTING — 0.002 mg/L 2023–2025 Resolved
BHC-GAMMA MONITORING AND REPORTING — 0.0002 mg/L 2023–2025 Resolved
Methoxychlor MONITORING AND REPORTING — 0.04 mg/L 2023–2025 Resolved
Toxaphene MONITORING AND REPORTING — 0.003 mg/L 2023–2025 Resolved
Hexachlorocyclopentadiene MONITORING AND REPORTING — 0.05 mg/L 2023–2025 Resolved
Heptachlor MONITORING AND REPORTING — 0.0004 mg/L 2023–2025 Resolved
Heptachlor epoxide MONITORING AND REPORTING — 0.0002 mg/L 2023–2025 Resolved
HEXACHLOROBENZENE MONITORING AND REPORTING — 0.001 mg/L 2023–2025 Resolved
Total Polychlorinated Biphenyls (PCB) MONITORING AND REPORTING — 0.0005 mg/L 2023–2025 Resolved
1,2-DIBROMO-3-CHLOROPROPANE MONITORING AND REPORTING — 0.0002 mg/L 2023–2025 Resolved
ETHYLENE DIBROMIDE MONITORING AND REPORTING — 0.00005 mg/L 2023–2025 Resolved
Chlordane MONITORING AND REPORTING — 0.002 mg/L 2023–2025 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2015 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2015 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

17 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 Yocha Dehe Potable Water System
PWSID 090605107
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 41
Service connections 56
Systems serving this area 1
Regulator US EPA (tribal primacy)
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Tancred 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 Tancred water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Tancred? ▼
Yocha Dehe Potable Water System (PWSID 090605107). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2025-07-22. Inspectors recorded 2 significant deficiencies.

What Should Tancred 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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