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Water system · PWSID CA3600306

THUNDERBIRD CWD

APPLE VALLEY, CA · ~2,098 people served

Check your exact address → APPLE VALLEY overview
100
Excellent
PurityRadar safety score

PWSID

CA3600306

State

California

City

APPLE VALLEY

Population served

2,098

Primary source

Groundwater

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

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

7

Violations on record

0

Unaddressed

4

Health-based

9

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2024. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Jan 2024 Resolved
Monitoring · Lead & Copper Rule began Feb 2018 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 2009 Resolved
Monitoring & reporting · Total coliform began Jun 2009 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 2004 Resolved
Max contaminant level (MCL) · Total coliform health-based began Apr 2002 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 1996 Resolved

Recent enforcement actions

  • State action · SOX Dec 2024
  • State action · SFL Jan 2024
  • State action · SOX Sep 2018
  • State action · SOX Apr 2018
  • State action · SFL Aug 2009
  • State action · SIA Jun 2004
  • State action · SOX Jun 2004
  • State action · SOX May 2002

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 2023

9.34 · max 9.34 mg/l as N · 2

Arsenic

1 station · latest Mar 2023

2.9 · max 2.9 ug/l · 1

Copper

1 station · latest Mar 2023

1.2 · max 1.2 ug/l · 1

Fluoride

1 station · latest Mar 2023

1.64 · max 1.64 mg/l · 1

Lead

1 station · latest Mar 2023

0.183 · max 0.183 ug/l · 1

Uranium

1 station · latest Mar 2023

2.95 · max 2.95 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 CA3600306 — 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.