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Water system · PWSID CA4900532

SONOMA COUNTY CSA 41-JENNER

SANTA ROSA, CA · ~406 people served

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

PWSID

CA4900532

State

California

City

SANTA ROSA

Population served

406

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

19

Violations on record

0

Unaddressed

14

Health-based

15

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2023. Official EPA record →

Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2021 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2021 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jul 2020 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Apr 2020 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2020 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jan 2020 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2020 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Oct 2019 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2019 Resolved
Monitoring · Lead & Copper Rule began May 2019 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2018 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2018 Resolved

Recent enforcement actions

  • State action · SOX Jul 2023
  • State action · SFL Dec 2021
  • State action · SFL Feb 2020
  • State action · SOX Jan 2020
  • State action · SOX Jul 2019
  • State action · SFL Jun 2019
  • State action · SFL Mar 2018
  • State action · SOX Jun 2015

This profile is built from EPA public records for system CA4900532 — 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.