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Greenfield, CA Tap Water Quality 2026

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

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

Main Utility: Greenfield County Wd PWSID: CA1510024 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 1.01 ppb, 7% of the action level and no violations are open. No PFAS was detected.

B

Greenfield earns a B for water quality

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

Lead: 1.01 ppb — 7% of the federal action level
PFAS tested, none detected
20 violations since 2015, 18 health-based
No violations currently open
Greenfield's lead level vs. all California community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 1.01 ppb — 7% of the federal action level
✓ Lower lead than 87% of California utilities
Population Served
3447
~3545 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
20 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
7% of EPA action level
1.01 ppb
Action level: 15 ppb
The 90th-percentile lead result is 1.01 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
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2019 Resolved
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2018 Resolved
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2018 Resolved
Arsenic MCL EXCEEDANCE 0.012 MG/L 0.010 mg/L 2018 Resolved
Arsenic MCL EXCEEDANCE 0.012 MG/L 0.010 mg/L 2018 Resolved
Arsenic MCL EXCEEDANCE 0.014 MG/L 0.010 mg/L 2017 Resolved
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2017 Resolved
Revised Total Coliform Rule MCL EXCEEDANCE — — 2017 Resolved
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2017 Resolved
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2017 Resolved
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2016 Resolved
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2016 Resolved
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2016 Resolved
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2016 Resolved
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2015 Resolved
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2015 Resolved
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2015 Resolved
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2015 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2015 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 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

20 violations are on record since 2015, of which 18 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Greenfield County Wd
PWSID CA1510024
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 3,447
Service connections 3,545
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Greenfield tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 1.01 ppb, 7% of the action level.
Does Greenfield water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Greenfield? ▼
Greenfield County Wd (PWSID CA1510024). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2023-02-16. No significant deficiencies were recorded.

What Should Greenfield 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.

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