EAST BIGGS WATER SYSTEM

SAN DIMAS, CA · ~15,000 people served

Check your exact address → SAN DIMAS overview

100

Excellent

PurityRadar safety score

PWSID

TX0710187

State

California

City

SAN DIMAS

Population served

15,000

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

Latest detections from EPA’s UCMR5 monitoring (through Oct 2024). Levels in parts per trillion (ppt).

Lithium

57,000 ppt

limit —

No federal limit

PFPeA

4.1 ppt

limit —

No federal limit

PFHxA

3.8 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2023. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Jun 2022 Resolved

Monitoring · Lead & Copper Rule began Jun 2021 Resolved

Monitoring & reporting · EPA contaminant 0999 began Apr 2018 Resolved

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

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

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

Recent enforcement actions

State action · SIF Jun 2023
State action · SOX Mar 2023
State action · SIE Jan 2023
State action · SIA Jan 2023
State action · SIF Oct 2022
State action · SOX Aug 2021
State action · SIE Jul 2021
State action · SIA Jul 2021

This profile is built from EPA public records for system TX0710187 — 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.