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Water system · PWSID CA4900549

SONOMA COUNTY CSA 41-FREESTONE

SANTA ROSA, CA · ~290 people served

Check your exact address → SANTA ROSA overview
100
Excellent
PurityRadar safety score

PWSID

CA4900549

State

California

City

SANTA ROSA

Population served

290

Primary source

Surface water

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

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

25

Violations on record

0

Unaddressed

19

Health-based

21

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2016. Official EPA record →

Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Oct 2015 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jul 2015 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jan 2015 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2014 Resolved
Monitoring & reporting · Total coliform began Apr 2014 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2014 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Apr 2013 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2013 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jan 2013 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2013 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Oct 2011 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2011 Resolved

Recent enforcement actions

  • State action · SOX Jan 2016
  • State action · SFL May 2015
  • State action · SOX Oct 2014
  • State action · SFL Sep 2014
  • State action · SFL Jun 2014
  • State action · SOX Jun 2014
  • State action · SFL Apr 2013
  • State action · SFL Mar 2013

This profile is built from EPA public records for system CA4900549 — 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.