Water system · PWSID CA4910014
ROHNERT PARK, CITY OF
PWSID
CA4910014
State
California
City
ROHNERT PARK
Population served
43,821
Primary source
Groundwater
Score history
▼ 12 points — the score moved from 100 to 88 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 Oct 2024). Levels in parts per trillion (ppt).
PFOS
Perfluorooctanesulfonic acid
4.5 ppt
limit 4 ppt
PFHxS
Perfluorohexanesulfonic acid
5.7 ppt
limit 10 ppt
Lithium
34,000 ppt
limit —
6:2 FTS
7.1 ppt
limit —
Violations & enforcement
278
Violations on record
0
Unaddressed
2
Health-based
13
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Mar 2024. Official EPA record →
Recent enforcement actions
- State action · SOX Mar 2024
- State action · SFL Sep 2021
- State action · SFL Sep 2021
- State action · SOX Jun 2018
- State action · SFJ May 2018
- State action · SOX Aug 2011
- State action · SFL May 2011
- State action · SIA Nov 2009
This profile is built from EPA public records for system CA4910014 — 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.