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Water system · PWSID CA3910011

TRACY, CITY OF

TRACY, CA · ~96,609 people served

Check your exact address → TRACY overview
100
Excellent
PurityRadar safety score

PWSID

CA3910011

State

California

City

TRACY

Population served

96,609

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

Lithium

28,500 ppt

limit —

No federal limit

Violations & enforcement

4

Violations on record

0

Unaddressed

2

Health-based

10

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2019. Official EPA record →

Other · EPA contaminant 7000 began Jul 2001 Resolved
Monitoring & reporting · Total coliform began Jan 1998 Resolved
Treatment technique · EPA contaminant 0200 health-based began May 1997 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Sep 1992 Resolved

Recent enforcement actions

  • State action · SOX Jul 2019
  • State action · SOX Nov 2001
  • State action · SIA Nov 2001
  • State action · SOX Nov 2001
  • State action · SOX Feb 1998
  • State action · SFJ Jun 1997
  • State action · SOX Jan 1994
  • State action · SIA Dec 1993

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

1 station · latest Mar 2020

2.4 · max 2.4 mg/l as N · 2

Arsenic

1 station · latest Mar 2020

0.87 · max 0.87 ug/l · 1

Fluoride

1 station · latest Mar 2020

0.19 · max 0.19 mg/l · 1

Lead

1 station · latest Mar 2020

0.372 · max 0.372 ug/l · 1

Manganese

1 station · latest Mar 2020

1.13 · max 1.13 ug/l · 1

Uranium

1 station · latest Mar 2020

3.03 · max 3.03 ug/l · 1

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 CA3910011 — 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.