Home/ Directory/ CA/ CHINO HILLS, CITY OF

Water system · PWSID CA3610036

CHINO HILLS, CITY OF

CHINO HILLS, CA · ~76,414 people served

Check your exact address → CHINO HILLS overview
100
Excellent
PurityRadar safety score

PWSID

CA3610036

State

California

City

CHINO HILLS

Population served

76,414

Primary source

SWP

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

3

Violations on record

0

Unaddressed

1

Health-based

34

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Apr 2017. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began Jul 1994 Resolved
Monitoring & reporting · Total coliform began Jul 1994 Resolved
Monitoring & reporting · Total coliform began Jul 1994 Resolved

Recent enforcement actions

  • State action · SFL Apr 2017
  • EPA/federal action · EOX Mar 2000
  • State action · SOX Oct 1994
  • State action · SOX Oct 1994
  • State action · SO8 Oct 1994
  • State action · SFJ Sep 1994
  • EPA/federal action · EOX Dec 1993
  • EPA/federal action · EFJ May 1993

This profile is built from EPA public records for system CA3610036 — 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.