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Water system · PWSID CA1910163

VALENCIA HEIGHTS WATER CO.

WEST COVINA, CA · ~7,775 people served

Check your exact address → WEST COVINA overview
71
Good
PurityRadar safety score

PWSID

CA1910163

State

California

City

WEST COVINA

Population served

7,775

Primary source

SWP

Score history

▼ 29 points — the score moved from 100 to 71 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 71

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 Dec 2024). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

5.7 ppt

limit 4 ppt

Above EPA limit · 1.4×

PFOS

Perfluorooctanesulfonic acid

4.4 ppt

limit 4 ppt

Above EPA limit · 1.1×

PFHxS

Perfluorohexanesulfonic acid

3.6 ppt

limit 10 ppt

Below EPA limit

Lithium

9,300 ppt

limit —

No federal limit

PFHxA

4.3 ppt

limit —

No federal limit

PFBS

4.1 ppt

limit —

No federal limit

PFPeA

3.7 ppt

limit —

No federal limit

Violations & enforcement

3

Violations on record

0

Unaddressed

2

Health-based

10

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 2000. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began Mar 1996 Resolved
Monitoring & reporting · Total coliform began Mar 1996 Resolved
Treatment technique · EPA contaminant 0200 health-based began Jun 1993 Resolved

Recent enforcement actions

  • EPA/federal action · EOX Mar 2000
  • State action · SOX May 1996
  • State action · SOX May 1996
  • State action · SOX Aug 1995
  • State action · SOX Aug 1995
  • State action · SOX Apr 1995
  • State action · SIA Apr 1995
  • State action · SOX Jul 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 Aug 2020

10.6 · max 10.6 mg/l as N · 2

Arsenic

1 station · latest Aug 2020

0.64 · max 0.64 ug/l · 1

Atrazine

1 station · latest Aug 2020

0.011 · max 0.011 ug/l · 1

Copper

1 station · latest Aug 2020

1.8 · max 1.8 ug/l · 1

Fluoride

1 station · latest Aug 2020

0.39 · max 0.39 mg/l · 1

Lead

1 station · latest Aug 2020

0.279 · max 0.279 ug/l · 1

Uranium

1 station · latest Aug 2020

15.4 · max 15.4 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 CA1910163 — 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.