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Water system · PWSID CA5710009

UC - DAVIS

DAVIS, CA · ~49,616 people served

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

PWSID

CA5710009

State

California

City

DAVIS

Population served

49,616

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 2023). Levels in parts per trillion (ppt).

Lithium

13,000 ppt

limit —

No federal limit

Violations & enforcement

4

Violations on record

0

Unaddressed

3

Health-based

10

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Oct 2022 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jan 2010 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2002 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 1992 Resolved

Recent enforcement actions

  • State action · SOX Aug 2023
  • State action · SFJ Oct 2022
  • State action · SOX Jan 2019
  • State action · SOX Feb 2010
  • State action · SOX Sep 2002
  • State action · SIA Sep 2002
  • State action · SOX Jan 1997
  • State action · SOX Jan 1997

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 Jul 2020

0.545 · max 0.545 mg/l as N · 2

Arsenic

1 station · latest Jul 2020

3.2 · max 3.2 ug/l · 1

Copper

1 station · latest Jul 2020

0.61 · max 0.61 ug/l · 1

Fluoride

1 station · latest Jul 2020

0.12 · max 0.12 mg/l · 1

Lead

1 station · latest Jul 2020

0.036 · max 0.036 ug/l · 1

Manganese

1 station · latest Jul 2020

0.54 · max 0.54 ug/l · 1

Uranium

1 station · latest Jul 2020

0.78 · max 0.78 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 CA5710009 — 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.