PWSID
CA3700919
State
California
City
COSTA MESA
Population served
250
Primary source
Surface water
Score history
No change since tracking began Jun 18, 2026.
2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.
PFAS & contaminant readings
No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.
Violations & enforcement
2
Violations on record
0
Unaddressed
0
Health-based
7
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Jan 2019. Official EPA record →
Recent enforcement actions
- State action · SOX Jan 2019
- State action · SFL Oct 2018
- State action · SOX Jul 2018
- State action · SFL Jul 2018
- State action · SFJ Feb 2018
- State action · SOX Sep 2008
- State action · SFL Jul 2008
This profile is built from EPA public records for system CA3700919 — 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.