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Water system · PWSID CA1910158

STERLING MUTUAL WATER COMPANY

EL MONTE, CA · ~198 people served

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

PWSID

CA1910158

State

California

City

EL MONTE

Population served

198

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

9

Violations on record

2

Unaddressed

1

Health-based

14

Enforcement actions

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

Reporting · EPA contaminant 5200 began Oct 2024 Unaddressed
Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Unaddressed
Monitoring & reporting · Lead & Copper Rule began Oct 2023 Addressed
Monitoring & reporting · Lead & Copper Rule began Oct 2022 Addressed
Monitoring · Lead & Copper Rule began Feb 2017 Resolved
Monitoring & reporting · Total coliform began Mar 2012 Resolved
Monitoring & reporting · Total coliform began Dec 2011 Resolved
Monitoring & reporting · Total coliform began Oct 2011 Resolved
Monitoring & reporting · Total coliform began Aug 2011 Resolved

Recent enforcement actions

  • State action · SFO Oct 2023
  • State action · SFO Oct 2022
  • State action · SOX Mar 2022
  • State action · SFO Feb 2022
  • State action · SOX Aug 2020
  • State action · SOX Apr 2017
  • State action · SFJ Mar 2017
  • State action · SOX Apr 2012

This profile is built from EPA public records for system CA1910158 — 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.