RINCON DEL DIABLO MWD (ID-1)

ESCONDIDO, CA · ~30,757 people served

Check your exact address → ESCONDIDO overview

100

Excellent

PurityRadar safety score

PWSID

CA3710018

State

California

City

ESCONDIDO

Population served

30,757

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 Sep 2025). Levels in parts per trillion (ppt).

Lithium

37,000 ppt

limit —

No federal limit

PFBA

10 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Sep 2014. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began Aug 2014 Resolved

Max contaminant level (MCL) · Total coliform health-based began Apr 2013 Resolved

Monitoring & reporting · Lead & Copper Rule began Aug 2001 Resolved

Recent enforcement actions

State action · SFL Sep 2014
State action · SOX Aug 2014
State action · SFL Jun 2013
State action · SOX May 2013
State action · SOX Jul 2003
State action · SIA Sep 2001

This profile is built from EPA public records for system CA3710018 — 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.