Home/ Directory/ CA/ SUNDALE MUTUAL WATER COMPANY A, B

Water system · PWSID CA1900563

SUNDALE MUTUAL WATER COMPANY A, B

LANCASTER, CA · ~1,050 people served

Check your exact address → LANCASTER overview

100

Excellent

PurityRadar safety score

PWSID

CA1900563

State

California

City

LANCASTER

Population served

1,050

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2022. Official EPA record →

Monitoring & reporting · EPA contaminant 3014 began Dec 2021 Resolved

Monitoring & reporting · EPA contaminant 0700 began Jul 2016 Resolved

Monitoring & reporting · EPA contaminant 0700 began May 2015 Resolved

Monitoring & reporting · Total coliform began Jan 2015 Resolved

Monitoring & reporting · Total coliform began Feb 2008 Resolved

Monitoring & reporting · Total coliform began Jan 2005 Resolved

Monitoring & reporting · Total coliform began Dec 2004 Resolved

Monitoring & reporting · Total coliform began Sep 2004 Resolved

Monitoring & reporting · Total coliform began Nov 2003 Resolved

Monitoring & reporting · Total coliform began Aug 2003 Resolved

Monitoring & reporting · Total coliform began May 2003 Resolved

Monitoring & reporting · Total coliform began Apr 2003 Resolved

Recent enforcement actions

State action · SOX Jun 2022
State action · SOX Jun 2022
State action · SOX Dec 2021
State action · SFL Dec 2021
State action · SFJ Jul 2020
State action · SOX Jul 2020
State action · SFL Jul 2020
State action · SOX Jul 2020

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

4.21 · max 4.21 mg/l as N · 2

Arsenic

1 station · latest Mar 2023

8.1 · max 8.1 ug/l · 1

Copper

1 station · latest Mar 2023

1.8 · max 1.8 ug/l · 1

Fluoride

1 station · latest Mar 2023

0.21 · max 0.21 mg/l · 1

Lead

1 station · latest Mar 2023

0.432 · max 0.432 ug/l · 1

Uranium

1 station · latest Mar 2023

6.3 · max 6.3 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 CA1900563 — 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.