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Water system · PWSID CA1700518

LOCH LOMOND MUTUAL WATER CO

COBB, CA · ~693 people served

Check your exact address → COBB overview
85
Excellent
PurityRadar safety score

PWSID

CA1700518

State

California

City

COBB

Population served

693

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

13

Violations on record

2

Unaddressed

2

Health-based

19

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2020. Official EPA record →

Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Unaddressed
Reporting · EPA contaminant 5200 began Oct 2024 Unaddressed
Monitoring · Lead & Copper Rule began Jun 2020 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2018 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2010 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2010 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2010 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2009 Resolved
Monitoring & reporting · Lead & Copper Rule began Sep 2008 Resolved
Monitoring & reporting · Nitrate began Jan 2007 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2007 Resolved
Monitoring & reporting · Lead & Copper Rule began Jun 2002 Resolved

Recent enforcement actions

  • State action · SFL Aug 2020
  • State action · SOX Jul 2020
  • State action · SIA Jan 2020
  • State action · SOX Jan 2020
  • State action · SOX Mar 2018
  • State action · SOX Dec 2013
  • State action · SOX Jul 2011
  • State action · SOX Jan 2011

This profile is built from EPA public records for system CA1700518 — 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.