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Water system · PWSID CA1010501

NPS-GRANT GROVE

THREE RIVERS, CA · ~2,950 people served

Check your exact address → THREE RIVERS overview
100
Excellent
PurityRadar safety score

PWSID

CA1010501

State

California

City

THREE RIVERS

Population served

2,950

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

4

Violations on record

1

Unaddressed

0

Health-based

5

Enforcement actions

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

Reporting · EPA contaminant 5200 began Jul 2025 Unaddressed
Monitoring & reporting · Lead & Copper Rule began Jan 2018 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2017 Resolved
Monitoring & reporting · Nitrate began Jan 2000 Resolved

Recent enforcement actions

  • State action · SOX Oct 2019
  • State action · SOX Jul 2018
  • State action · SFL Apr 2018
  • State action · SOX Feb 2018
  • State action · SIA Dec 2001

This profile is built from EPA public records for system CA1010501 — 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.