CHINO, CITY OF

CHINO, CA · ~86,435 people served

Check your exact address → CHINO overview

100

Excellent

PurityRadar safety score

PWSID

CA3610012

State

California

City

CHINO

Population served

86,435

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Sep 2022. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2021 Resolved

Monitoring & reporting · EPA contaminant 3014 began Jul 2014 Resolved

Monitoring & reporting · EPA contaminant 3014 began Jun 2014 Resolved

Monitoring & reporting · Lead & Copper Rule began Jun 2014 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2006 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 2005 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2003 Resolved

Recent enforcement actions

State action · SOX Sep 2022
State action · SFL Feb 2022
State action · SOX Mar 2018
State action · SOX Jan 2018
State action · SFL Feb 2015
State action · SFJ Aug 2014
State action · SOX Aug 2014
State action · SOX Sep 2011

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

1 station · latest May 2022

6.09 · max 6.09 mg/l as N · 2

Arsenic

1 station · latest May 2022

1.8 · max 1.8 ug/l · 1

Fluoride

1 station · latest May 2022

0.2 · max 0.2 mg/l · 1

Manganese

1 station · latest May 2022

0.61 · max 0.61 ug/l · 1

Uranium

1 station · latest May 2022

1.33 · max 1.33 ug/l · 1

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system CA3610012 — 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.