IMPROVEMENT DISTRICT NO. 1

THREE RIVERS, CA · ~200 people served

Check your exact address → THREE RIVERS overview

100

Excellent

PurityRadar safety score

PWSID

CA5400968

State

California

City

THREE RIVERS

Population served

200

Primary source

Surface water

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 Feb 2020. Official EPA record →

Monitoring · Lead & Copper Rule began Sep 2019 Resolved

Monitoring & reporting · Nitrate began Jan 2017 Resolved

Monitoring & reporting · Nitrate began Jan 2016 Resolved

Monitoring & reporting · Thallium began Jan 2015 Resolved

Monitoring & reporting · Total coliform began Oct 2014 Resolved

Treatment technique · EPA contaminant 0800 health-based began Mar 2014 Resolved

Treatment technique · EPA contaminant 0800 health-based began Feb 2014 Resolved

Treatment technique · EPA contaminant 0800 health-based began Jan 2014 Resolved

Monitoring & reporting · Lead & Copper Rule began Sep 2013 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2013 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2013 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2012 Resolved

Recent enforcement actions

State action · SOX Feb 2020
State action · SOX Jan 2020
State action · SOX Dec 2019
State action · SFL Oct 2019
State action · SFL Feb 2018
State action · SFL Feb 2017
State action · SOX Jul 2016
State action · SFL Feb 2016

This profile is built from EPA public records for system CA5400968 — 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.