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Water system · PWSID CA5810004

CITY OF WHEATLAND

WHEATLAND, CA · ~4,124 people served

Check your exact address → WHEATLAND overview

Fair

PurityRadar safety score

PWSID

CA5810004

State

California

City

WHEATLAND

Population served

4,124

Primary source

Groundwater

Score history

▼ 31 points — the score moved from 100 to 69 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 69

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

PFOS

Perfluorooctanesulfonic acid

7.3 ppt

limit 4 ppt

Above EPA limit · 1.8×

PFHxS

Perfluorohexanesulfonic acid

6.2 ppt

limit 10 ppt

Near EPA limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2018. Official EPA record →

Monitoring & reporting · Nitrate began Jan 2007 Resolved

Monitoring & reporting · Nitrate began Jan 2000 Resolved

Max contaminant level (MCL) · Total coliform health-based began Oct 1997 Resolved

Max contaminant level (MCL) · Total coliform health-based began Sep 1997 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved

Recent enforcement actions

State action · SOX Feb 2018
State action · SIA Feb 2008
EPA/federal action · EOX Dec 2003
State action · SIA Jul 2001
State action · SOX Nov 1997
State action · SIA Nov 1997
State action · SIA Oct 1997
State action · SOX Sep 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 Aug 2021

0.634 · max 0.634 mg/l as N · 2

Arsenic

1 station · latest Aug 2021

2.1 · max 2.1 ug/l · 1

Fluoride

1 station · latest Aug 2021

0.22 · max 0.22 mg/l · 1

Lead

1 station · latest Aug 2021

0.056 · max 0.056 ug/l · 1

Manganese

1 station · latest Aug 2021

9.5 · max 9.5 ug/l · 1

Uranium

1 station · latest Aug 2021

0.06 · max 0.06 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 CA5810004 — 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.