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Water system · PWSID CA4710007

MONTAGUE, CITY OF

MONTAGUE, CA · ~1,264 people served

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

PWSID

CA4710007

State

California

City

MONTAGUE

Population served

1,264

Primary source

Surface water

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

10

Violations on record

2

Unaddressed

9

Health-based

13

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2019. Official EPA record →

Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Unaddressed
Reporting · EPA contaminant 5200 began Oct 2024 Unaddressed
Treatment technique · Lead & Copper Rule health-based began Jun 2019 Resolved
Treatment technique · EPA contaminant 0200 health-based began Sep 2014 Resolved
Treatment technique · EPA contaminant 0300 health-based began Jul 2014 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2010 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2009 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2009 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Oct 2008 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2008 Resolved

Recent enforcement actions

  • State action · SOX Jun 2019
  • State action · SFL Jun 2019
  • State action · SOX Mar 2018
  • State action · SIE Oct 2014
  • State action · SOX Oct 2014
  • State action · SIE Aug 2014
  • State action · SOX Aug 2014
  • State action · SFL Mar 2013

This profile is built from EPA public records for system CA4710007 — 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.