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Water system · PWSID CA4900548

HOLLAND HEIGHTS MUTUAL WATER COMPANY

SANTA ROSA, CA · ~300 people served

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

PWSID

CA4900548

State

California

City

SANTA ROSA

Population served

300

Primary source

Groundwater

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

8

Violations on record

0

Unaddressed

0

Health-based

12

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Oct 2013. Official EPA record →

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2010 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2010 Resolved
Monitoring & reporting · Nitrate began Jan 2006 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2005 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2005 Resolved
Monitoring & reporting · Total coliform began Nov 1996 Resolved
Monitoring & reporting · Total coliform began Nov 1994 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved

Recent enforcement actions

  • State action · SOX Oct 2013
  • State action · SFL Mar 2013
  • State action · SOX Aug 2008
  • State action · SFL Jul 2008
  • State action · SFL Jun 2007
  • State action · SOX Jun 2007
  • State action · SOX Feb 2006
  • EPA/federal action · EOX Mar 2000

This profile is built from EPA public records for system CA4900548 — 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.