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Norco, CA Tap Water Quality 2026

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

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

Main Utility: Norco, City Of PWSID: CA3310025 Updated: 2026 Q2
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PFAS above the federal limit at 2 of 6 sampling points

Lead was not detected and no violations are open. However, PFAS exceeds the federal limit at 2 of 6 sampling points, running as high as 5.6 times the limit.

C

Norco earns a C for water quality

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

Lead: not detected
PFAS above the federal limit at 2 of 6 sampling points
43 violations since 2015, 1 health-based
No violations currently open
Norco'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
23926
~7100 connections
Water Source
Surface water
Purchased from another system — SDWIS source code SWP
Active Violations
0
43 since 2015, all resolved

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
TTHM MCL EXCEEDANCE 0.083 MG/L 0.080 mg/L 2025 Archived
Arsenic MONITORING AND REPORTING — 0.010 mg/L 2024 Resolved
Barium MONITORING AND REPORTING — 2 mg/L 2024 Resolved
Cadmium MONITORING AND REPORTING — 0.005 mg/L 2024 Resolved
Chromium MONITORING AND REPORTING — 0.1 mg/L 2024 Resolved
Fluoride MONITORING AND REPORTING — 4.0 mg/L 2024 Resolved
Mercury MONITORING AND REPORTING — 0.002 mg/L 2024 Resolved
Nickel MONITORING AND REPORTING — — 2024 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2024 Resolved
Antimony, Total MONITORING AND REPORTING — 0.006 mg/L 2024 Resolved
Beryllium, Total MONITORING AND REPORTING — 0.004 mg/L 2024 Resolved
Thallium, Total MONITORING AND REPORTING — 0.002 mg/L 2024 Resolved
Selenium MONITORING AND REPORTING — 0.05 mg/L 2024 Resolved
Endrin MONITORING AND REPORTING — 0.002 mg/L 2024 Resolved
BHC-GAMMA MONITORING AND REPORTING — 0.0002 mg/L 2024 Resolved
Methoxychlor MONITORING AND REPORTING — 0.04 mg/L 2024 Resolved
Toxaphene MONITORING AND REPORTING — 0.003 mg/L 2024 Resolved
Dalapon MONITORING AND REPORTING — 0.2 mg/L 2024 Resolved
Diquat MONITORING AND REPORTING — 0.02 mg/L 2024 Resolved
Endothall MONITORING AND REPORTING — 0.1 mg/L 2024 Resolved
Glyphosate MONITORING AND REPORTING — 0.7 mg/L 2024 Resolved
Di(2-ethylhexyl) adipate MONITORING AND REPORTING — 0.4 mg/L 2024 Resolved
OXAMYL MONITORING AND REPORTING — 0.2 mg/L 2024 Resolved
Simazine MONITORING AND REPORTING — 0.004 mg/L 2024 Resolved
Di(2-ethylhexyl) phthalate MONITORING AND REPORTING — 0.006 mg/L 2024 Resolved
Picloram MONITORING AND REPORTING — 0.5 mg/L 2024 Resolved
Dinoseb MONITORING AND REPORTING — 0.007 mg/L 2024 Resolved
Hexachlorocyclopentadiene MONITORING AND REPORTING — 0.05 mg/L 2024 Resolved
Carbofuran MONITORING AND REPORTING — 0.04 mg/L 2024 Resolved
Atrazine MONITORING AND REPORTING — 0.003 mg/L 2024 Resolved
LASSO MONITORING AND REPORTING — — 2024 Resolved
2,3,7,8-TCDD MONITORING AND REPORTING — 0.00000003 mg/L 2024 Resolved
Heptachlor MONITORING AND REPORTING — 0.0004 mg/L 2024 Resolved
Heptachlor epoxide MONITORING AND REPORTING — 0.0002 mg/L 2024 Resolved
2,4-D MONITORING AND REPORTING — 0.07 mg/L 2024 Resolved
2,4,5-TP MONITORING AND REPORTING — 0.05 mg/L 2024 Resolved
HEXACHLOROBENZENE MONITORING AND REPORTING — 0.001 mg/L 2024 Resolved
Benzo(a)pyrene MONITORING AND REPORTING — 0.0002 mg/L 2024 Resolved
Pentachlorophenol MONITORING AND REPORTING — 0.001 mg/L 2024 Resolved
Total Polychlorinated Biphenyls (PCB) MONITORING AND REPORTING — 0.0005 mg/L 2024 Resolved
1,2-DIBROMO-3-CHLOROPROPANE MONITORING AND REPORTING — 0.0002 mg/L 2024 Resolved
ETHYLENE DIBROMIDE MONITORING AND REPORTING — 0.00005 mg/L 2024 Resolved
Chlordane MONITORING AND REPORTING — 0.002 mg/L 2024 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

43 violations are on record since 2015, of which 1 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Norco, City Of
PWSID CA3310025
Water source Surface water — Purchased from another system — SDWIS source code SWP
Population served 23,926
Service connections 7,100
Systems serving this area 6
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Norco tap water safe to drink? ▼
It meets most federal standards, but PFAS exceeds the federal limit at 2 of 6 sampling points. No violations are currently open.
Does Norco water have PFAS? ▼
Yes. PFAS exceeds the federal limit at 2 of 6 sampling points, running as high as 5.6 times the limit. Limits are enforced on a running annual average at each sampling point, not on a single sample.
Who supplies water to Norco? ▼
Norco, City Of (PWSID CA3310025), one of 6 systems serving this area. Surface water. Purchased from another system — SDWIS source code SWP
When was this system last inspected? ▼
It was last inspected on 2024-09-17. No significant deficiencies were recorded.

What Should Norco Residents Do?

1
Consider a reverse-osmosis filter
Reverse osmosis removes more than 95% of PFAS. Standard carbon pitchers do not.
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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