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Water system · PWSID OH4800112

ARROWHEAD LAKE MHP

WEST COVINA, CA · ~327 people served

Check your exact address → WEST COVINA overview
100
Excellent
PurityRadar safety score

PWSID

OH4800112

State

California

City

WEST COVINA

Population served

327

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

21

Violations on record

3

Unaddressed

4

Health-based

43

Enforcement actions

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

Other · EPA contaminant 7000 began Jan 2022 Unaddressed
Other · EPA contaminant 7000 began Dec 2018 Unaddressed
Other · EPA contaminant 7000 began Jul 2016 Unaddressed
Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2024 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2024 Resolved
Monitoring · Lead & Copper Rule began Feb 2018 Resolved
Monitoring & reporting · Total coliform began Jun 2011 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2007 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2007 Resolved
Monitoring & reporting · EPA contaminant 2051 began Jul 2005 Resolved
Monitoring & reporting · EPA contaminant 2037 began Jul 2005 Resolved
Monitoring & reporting · EPA contaminant 2050 began Jul 2005 Resolved

Recent enforcement actions

  • State action · SIF Jul 2025
  • State action · SOX Aug 2024
  • State action · SIE Aug 2024
  • State action · SIA Aug 2024
  • State action · SIA Jan 2022
  • State action · SIA Dec 2018
  • State action · SIF Apr 2018
  • State action · SIE Mar 2018

This profile is built from EPA public records for system OH4800112 — 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.