PWSID
CA3710025
State
California
City
CHULA VISTA
Population served
191,282
Primary source
Surface water
Score history
▼ 50 points — the score moved from 100 to 50 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 Jul 2025). Levels in parts per trillion (ppt).
PFOA
Perfluorooctanoic acid
7.9 ppt
limit 4 ppt
PFOS
Perfluorooctanesulfonic acid
5 ppt
limit 4 ppt
PFHxS
Perfluorohexanesulfonic acid
7.1 ppt
limit 10 ppt
Lithium
9,750 ppt
limit —
PFBA
8.9 ppt
limit —
PFBS
7.5 ppt
limit —
PFHxA
5.5 ppt
limit —
PFPeA
5 ppt
limit —
PFHpA
3.3 ppt
limit —
Violations & enforcement
1
Violations on record
0
Unaddressed
1
Health-based
15
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Nov 2010. Official EPA record →
Recent enforcement actions
- State action · SOX Nov 2010
- State action · SFL Nov 2010
- State action · SIA Jan 1994
- State action · SFK Sep 1986
- State action · SIC Sep 1986
- State action · SIF Sep 1986
- State action · SIA Sep 1986
- State action · SID Sep 1986
This profile is built from EPA public records for system CA3710025 — 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.