NAS NORTH ISLAND & NAB CORONADO

SAN DIEGO, CA · ~36,990 people served

Check your exact address → SAN DIEGO overview

100

Excellent

PurityRadar safety score

PWSID

CA3710750

State

California

City

SAN DIEGO

Population served

36,990

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

Lithium

28,800 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Apr 2008. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began Jan 2008 Resolved

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2006 Resolved

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2005 Resolved

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2005 Resolved

Recent enforcement actions

State action · SFL Apr 2008
State action · SOX Feb 2008
State action · SOX Apr 2007
State action · SIA Aug 2006
State action · SIA May 2006
State action · SIA Feb 2006

This profile is built from EPA public records for system CA3710750 — 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.