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Water system · PWSID CA1910053

HEMLOCK MUTUAL WATER CO.

EL MONTE, CA · ~686 people served

Check your exact address → EL MONTE overview
85
Excellent
PurityRadar safety score

PWSID

CA1910053

State

California

City

EL MONTE

Population served

686

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 85 Jun 18, 2026 · score 85

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

39

Violations on record

2

Unaddressed

4

Health-based

24

Enforcement actions

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

Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Unaddressed
Reporting · EPA contaminant 5200 began Oct 2024 Unaddressed
Other · EPA contaminant 7500 began Jul 2024 Resolved
Other · EPA contaminant 7500 began Jan 2024 Resolved
Other · EPA contaminant 7500 began Oct 2023 Resolved
Other · EPA contaminant 7500 began Jul 2023 Resolved
Monitoring & reporting · Total coliform began Nov 2012 Resolved
Monitoring & reporting · EPA contaminant 3014 began Oct 2012 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2012 Resolved
Monitoring & reporting · Total coliform began Jun 2010 Resolved
Monitoring & reporting · EPA contaminant 0999 began Oct 2009 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2009 Resolved

Recent enforcement actions

  • State action · SOX Aug 2025
  • State action · SFL Dec 2024
  • State action · SFO Jan 2013
  • State action · SOX Dec 2012
  • State action · SOX Dec 2012
  • State action · SOX Nov 2012
  • State action · SFL Oct 2012
  • State action · SIA Jul 2010

This profile is built from EPA public records for system CA1910053 — 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.