Cantua Creek, CA Tap Water Quality 2026

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

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

Main Utility: Fcsa 32 - Cantua Creek PWSID: CA1000359 Updated: 2026 Q2

✅

No federal limits exceeded on record

Lead is 1.60 ppb, 11% of the action level and no violations are open. PFAS has never been sampled at this system.

Cantua Creek earns a B for water quality

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

Lead: 1.60 ppb — 11% of the federal action level

PFAS never sampled at this system

61 violations since 2015, 56 health-based

No violations currently open

Cantua Creek's lead level vs. all California community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: 1.60 ppb — 11% of the federal action level

✓ Lower lead than 71% of California utilities

Population Served

342

~79 connections

Water Source

Surface water

Drawn from surface water — SDWIS source code SW

Active Violations

61 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

11% of EPA action level

1.60 ppb

Action level: 15 ppb

The 90th-percentile lead result is 1.60 ppb, 11% 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)

Contaminant	Type	Measured	Limit	Period	Status
TTHM	MCL EXCEEDANCE	0.19 MG/L	0.080 mg/L	2022	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.07725 MG/L	0.060 mg/L	2022	Archived
TTHM	MCL EXCEEDANCE	0.1725 MG/L	0.080 mg/L	2021	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.07325 MG/L	0.060 mg/L	2021	Archived
TTHM	MCL EXCEEDANCE	0.1825 MG/L	0.080 mg/L	2021	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.07475 MG/L	0.060 mg/L	2021	Archived
TTHM	MCL EXCEEDANCE	0.18 MG/L	0.080 mg/L	2021	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.081 MG/L	0.060 mg/L	2021	Archived
TTHM	MCL EXCEEDANCE	0.1675 MG/L	0.080 mg/L	2021	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.07875 MG/L	0.060 mg/L	2021	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.0815 MG/L	0.060 mg/L	2020	Archived
TTHM	MCL EXCEEDANCE	0.17 MG/L	0.080 mg/L	2020	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.0883 MG/L	0.060 mg/L	2020	Archived
TTHM	MCL EXCEEDANCE	0.1458 MG/L	0.080 mg/L	2020	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.0848 MG/L	0.060 mg/L	2020	Archived
TTHM	MCL EXCEEDANCE	0.126 MG/L	0.080 mg/L	2020	Archived
TTHM	MCL EXCEEDANCE	0.108 MG/L	0.080 mg/L	2020	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.088 MG/L	0.060 mg/L	2020	Archived
TTHM	MCL EXCEEDANCE	0.104 MG/L	0.080 mg/L	2019	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.092 MG/L	0.060 mg/L	2019	Archived
TTHM	MCL EXCEEDANCE	0.143 MG/L	0.080 mg/L	2019	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.075 MG/L	0.060 mg/L	2019	Archived
TTHM	MCL EXCEEDANCE	0.178 MG/L	0.080 mg/L	2019	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.077 MG/L	0.060 mg/L	2019	Archived
TTHM	MCL EXCEEDANCE	0.126 MG/L	0.080 mg/L	2019	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.077 MG/L	0.060 mg/L	2019	Archived
TTHM	MCL EXCEEDANCE	0.173 MG/L	0.080 mg/L	2018	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.073 MG/L	0.060 mg/L	2018	Archived
TTHM	MCL EXCEEDANCE	0.153 MG/L	0.080 mg/L	2018	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.074 MG/L	0.060 mg/L	2018	Archived
TTHM	MCL EXCEEDANCE	0.125 MG/L	0.080 mg/L	2018	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.079 MG/L	0.060 mg/L	2018	Archived
TTHM	MCL EXCEEDANCE	0.11 MG/L	0.080 mg/L	2018	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.067 MG/L	0.060 mg/L	2018	Archived
TTHM	MCL EXCEEDANCE	0.1298 MG/L	0.080 mg/L	2017	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.0668 MG/L	0.060 mg/L	2017	Archived
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2017	Resolved
TTHM	MCL EXCEEDANCE	0.1298 MG/L	0.080 mg/L	2017	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.0668 MG/L	0.060 mg/L	2017	Archived
TTHM	MCL EXCEEDANCE	0.1475 MG/L	0.080 mg/L	2017	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.079 MG/L	0.060 mg/L	2017	Archived
TTHM	MCL EXCEEDANCE	0.185 MG/L	0.080 mg/L	2017	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.1085 MG/L	0.060 mg/L	2017	Archived
TTHM	MCL EXCEEDANCE	0.193 MG/L	0.080 mg/L	2016	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.11 MG/L	0.060 mg/L	2016	Archived
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2016	Resolved
Stage 2 Disinfectants and Disinfection Byproducts Rule	OTHER	—	—	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
TTHM	MCL EXCEEDANCE	0.22 MG/L	0.080 mg/L	2016	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.115 MG/L	0.060 mg/L	2016	Archived
TTHM	MCL EXCEEDANCE	0.22 MG/L	0.080 mg/L	2016	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.09 MG/L	0.060 mg/L	2016	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.08 MG/L	0.060 mg/L	2015	Archived
TTHM	MCL EXCEEDANCE	0.2 MG/L	0.080 mg/L	2015	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.085 MG/L	0.060 mg/L	2015	Archived
TTHM	MCL EXCEEDANCE	0.203 MG/L	0.080 mg/L	2015	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.072 MG/L	0.060 mg/L	2015	Archived
TTHM	MCL EXCEEDANCE	0.205 MG/L	0.080 mg/L	2015	Archived
TTHM	MCL EXCEEDANCE	0.215 MG/L	0.080 mg/L	2015	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.083 MG/L	0.060 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

61 violations are on record since 2015, of which 56 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Fcsa 32 - Cantua Creek

PWSID CA1000359

Water source Surface water — Drawn from surface water — SDWIS source code SW

Population served 342

Service connections 79

Systems serving this area 2

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Cantua Creek tap water safe to drink? ▼

No federal limit is exceeded on record. No violations are currently open. Lead is 1.60 ppb, 11% of the action level.

Does Cantua Creek 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 Cantua Creek? ▼

Fcsa 32 - Cantua Creek (PWSID CA1000359), one of 2 systems serving this area. Surface water. Drawn from surface water — SDWIS source code SW

When was this system last inspected? ▼

It was last inspected on 2023-02-10. No significant deficiencies were recorded.

What Should Cantua Creek Residents Do?

Read your annual water report

Your supplier publishes a Consumer Confidence Report each July covering the prior year.

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.

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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