EAST BAY MUD

OAKLAND, CA · ~1,442,800 people served

Check your exact address → OAKLAND overview

100

Excellent

PurityRadar safety score

PWSID

CA0110005

State

California

City

OAKLAND

Population served

1,442,800

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

Latest detections from EPA’s UCMR5 monitoring (through Oct 2023). Levels in parts per trillion (ppt).

PFBA

5.1 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 2000. Official EPA record →

Other · Total coliform began Nov 1995 Resolved

Max contaminant level (MCL) · EPA contaminant 2980 health-based began Aug 1995 Resolved

Monitoring & reporting · Total coliform began Jul 1994 Resolved

Monitoring & reporting · EPA contaminant 0200 began Jul 1994 Resolved

Monitoring & reporting · Total coliform began Sep 1992 Resolved

Recent enforcement actions

EPA/federal action · EOX Mar 2000
State action · SFJ Mar 1996
State action · SOX Jan 1996
State action · SOX Jan 1996
State action · SFK Dec 1995
State action · SOX Sep 1995
State action · SOX Aug 1994
State action · SIA Jul 1994

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

12 stations · latest Dec 2023

0.096 · max 0.736 mg/l as N · 172

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 CA0110005 — 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.