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Hughson, CA Tap Water Quality 2026

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

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

Main Utility: Hughson, City Of PWSID: CA5010008 Updated: 2026 Q2
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1 violation currently open

Lead was not detected. No PFAS was detected.

D

Hughson earns a D for water quality

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

Lead: not detected
PFAS tested, none detected
43 violations since 2015, 42 health-based
1 violation currently open
Hughson's lead level vs. all California community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: Not detected — 0% of the federal action level
✓ Lower lead than % of California utilities
Population Served
7409
~2329 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
1
1 open of 43 since 2015

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
0% of EPA action level
Not detected
Action level: 15 ppb
Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Arsenic MCL EXCEEDANCE 0.0143 MG/L 0.010 mg/L 2025 Archived
Arsenic MCL EXCEEDANCE 0.0153 MG/L 0.010 mg/L 2025 Archived
Arsenic MCL EXCEEDANCE 0.015 MG/L 0.010 mg/L 2025 Archived
LEAD AND COPPER RULE REVISIONS TREATMENT TECHNIQUE — — 2024 Unaddressed
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2024 Unaddressed
Arsenic MCL EXCEEDANCE 0.014 MG/L 0.010 mg/L 2024 Archived
Arsenic MCL EXCEEDANCE 0.012 MG/L 0.010 mg/L 2024 Archived
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2024 Archived
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2024 Archived
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2023 Archived
Arsenic MCL EXCEEDANCE 0.012 MG/L 0.010 mg/L 2023 Archived
Arsenic MCL EXCEEDANCE 0.012 MG/L 0.010 mg/L 2023 Archived
Arsenic MCL EXCEEDANCE 0.015 MG/L 0.010 mg/L 2023 Archived
Arsenic MCL EXCEEDANCE 0.013 MG/L 0.010 mg/L 2022 Archived
Arsenic MCL EXCEEDANCE 0.013 MG/L 0.010 mg/L 2022 Archived
Arsenic MCL EXCEEDANCE 0.013 MG/L 0.010 mg/L 2022 Archived
Arsenic MCL EXCEEDANCE 0.013 MG/L 0.010 mg/L 2022 Archived
Arsenic MCL EXCEEDANCE 0.0133 MG/L 0.010 mg/L 2021 Archived
Arsenic MCL EXCEEDANCE 0.0141 MG/L 0.010 mg/L 2021 Archived
Arsenic MCL EXCEEDANCE 0.015 MG/L 0.010 mg/L 2021 Archived
Arsenic MCL EXCEEDANCE 0.0159 MG/L 0.010 mg/L 2021 Archived
Arsenic MCL EXCEEDANCE 0.0153 MG/L 0.010 mg/L 2020 Archived
Arsenic MCL EXCEEDANCE 0.014 MG/L 0.010 mg/L 2020 Archived
Arsenic MCL EXCEEDANCE 0.014 MG/L 0.010 mg/L 2020 Archived
Arsenic MCL EXCEEDANCE 0.0138 MG/L 0.010 mg/L 2020 Archived
Arsenic MCL EXCEEDANCE 0.014 MG/L 0.010 mg/L 2019 Archived
Arsenic MCL EXCEEDANCE 0.015 MG/L 0.010 mg/L 2019 Archived
Arsenic MCL EXCEEDANCE 0.015 MG/L 0.010 mg/L 2019 Archived
Arsenic MCL EXCEEDANCE 0.0151 MG/L 0.010 mg/L 2019 Archived
Arsenic MCL EXCEEDANCE 0.015 MG/L 0.010 mg/L 2018 Archived
Arsenic MCL EXCEEDANCE 0.015 MG/L 0.010 mg/L 2018 Archived
Arsenic MCL EXCEEDANCE 0.015 MG/L 0.010 mg/L 2018 Archived
Arsenic MCL EXCEEDANCE 0.012 MG/L 0.010 mg/L 2018 Archived
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2017 Archived
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2017 Archived
Arsenic MCL EXCEEDANCE 0.0115 MG/L 0.010 mg/L 2017 Archived
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2016 Archived
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2016 Archived
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2016 Archived
Arsenic MCL EXCEEDANCE 0.012 MG/L 0.010 mg/L 2015 Archived
Arsenic MCL EXCEEDANCE 0.015 MG/L 0.010 mg/L 2015 Archived
Arsenic MCL EXCEEDANCE 0.014 MG/L 0.010 mg/L 2015 Archived
Arsenic MCL EXCEEDANCE 0.012 MG/L 0.010 mg/L 2015 Archived
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

1 violation remains open, out of 43 recorded since 2015 (42 health-based).

About the Main Water System

Utility Hughson, City Of
PWSID CA5010008
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 7,409
Service connections 2,329
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Hughson tap water safe to drink? ▼
No federal limit is exceeded on record. 1 violation(s) remain open.
Does Hughson water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Hughson? ▼
Hughson, City Of (PWSID CA5010008). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2024-06-18. No significant deficiencies were recorded.

What Should Hughson 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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