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Water system · PWSID CA0600008

COLUSA CO. WWD #1 - GRIMES

GRIMES, CA · ~512 people served

Check your exact address → GRIMES overview
100
Excellent
PurityRadar safety score

PWSID

CA0600008

State

California

City

GRIMES

Population served

512

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

33

Violations on record

1

Unaddressed

25

Health-based

16

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Sep 2024. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2025 Unaddressed
Monitoring & reporting · Lead & Copper Rule began Oct 2023 Resolved
Monitoring · Lead & Copper Rule began Nov 2022 Resolved
Monitoring · Lead & Copper Rule began Oct 2021 Resolved
Monitoring · Lead & Copper Rule began Dec 2020 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2017 Resolved
Monitoring & reporting · Nitrate began Jan 2017 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2015 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2015 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2015 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2015 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2014 Resolved

Recent enforcement actions

  • State action · SOX Sep 2024
  • State action · SFL Dec 2023
  • State action · SOX Jan 2023
  • State action · SFL Dec 2022
  • State action · SOX Jun 2022
  • State action · SFJ Dec 2021
  • State action · SOX Jan 2021
  • State action · SFJ Jan 2021

This profile is built from EPA public records for system CA0600008 — 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.