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Water system · PWSID CA4100510

REDWOOD TERRACE MUTUAL

100
Excellent
PurityRadar safety score

PWSID

CA4100510

State

California

City

LA HONDA

Population served

56

Primary source

GU

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

67

Violations on record

0

Unaddressed

2

Health-based

22

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2025. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Jul 2024 Resolved
Treatment technique · Lead & Copper Rule health-based began Jun 2019 Resolved
Monitoring & reporting · Thallium began Jan 2019 Resolved
Monitoring & reporting · Total coliform began Jun 2010 Resolved
Monitoring & reporting · EPA contaminant 4030 began Apr 2009 Resolved
Monitoring & reporting · EPA contaminant 2991 began Jan 2009 Resolved
Monitoring & reporting · EPA contaminant 2983 began Jan 2009 Resolved
Monitoring & reporting · EPA contaminant 2969 began Jan 2009 Resolved
Monitoring & reporting · EPA contaminant 2968 began Jan 2009 Resolved
Monitoring & reporting · EPA contaminant 2980 began Jan 2009 Resolved
Monitoring & reporting · EPA contaminant 4030 began Jan 2009 Resolved
Monitoring & reporting · EPA contaminant 2992 began Jan 2009 Resolved

Recent enforcement actions

  • State action · SOX Jun 2025
  • State action · SFL May 2025
  • State action · SOX Jul 2021
  • State action · SFL Feb 2020
  • State action · SFL Jul 2019
  • State action · SOX Jan 2019
  • State action · SOX Jan 2019
  • State action · SOX Jan 2019

This profile is built from EPA public records for system CA4100510 — 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.