PWSID
CA3310025
State
California
City
NORCO
Population served
25,068
Primary source
SWP
Score history
▼ 70 points — the score moved from 100 to 30 on Jun 18, 2026, as newly published EPA data was incorporated.
2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.
PFAS & contaminant readings
Latest detections from EPA’s UCMR5 monitoring (through Jun 2024). Levels in parts per trillion (ppt).
PFOS
Perfluorooctanesulfonic acid
31 ppt
limit 4 ppt
PFOA
Perfluorooctanoic acid
14 ppt
limit 4 ppt
PFHxS
Perfluorohexanesulfonic acid
14 ppt
limit 10 ppt
Lithium
35,600 ppt
limit —
PFBA
18 ppt
limit —
PFBS
12 ppt
limit —
PFPeA
7.6 ppt
limit —
PFHxA
3.7 ppt
limit —
Violations & enforcement
64
Violations on record
0
Unaddressed
12
Health-based
37
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Sep 2025. Official EPA record →
Recent enforcement actions
- State action · SFL Sep 2025
- State action · SOX Aug 2025
- State action · SOX May 2013
- State action · SFL May 2013
- State action · SOX May 2013
- State action · SOX May 2013
- State action · SFJ Feb 2013
- State action · SOX Oct 2011
This profile is built from EPA public records for system CA3310025 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.