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Water system · PWSID CA3610024

HESPERIA WD

HESPERIA, CA · ~100,744 people served

Check your exact address → HESPERIA overview
32
Action needed
PurityRadar safety score

PWSID

CA3610024

State

California

City

HESPERIA

Population served

100,744

Primary source

Groundwater

Score history

▼ 68 points — the score moved from 100 to 32 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 32

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

PFOS

Perfluorooctanesulfonic acid

9.9 ppt

limit 4 ppt

Above EPA limit · 2.5×

PFOA

Perfluorooctanoic acid

7.4 ppt

limit 4 ppt

Above EPA limit · 1.9×

PFHxS

Perfluorohexanesulfonic acid

8.4 ppt

limit 10 ppt

Near EPA limit

Lithium

10,200 ppt

limit —

No federal limit

6:2 FTS

50 ppt

limit —

No federal limit

PFPeA

4.2 ppt

limit —

No federal limit

PFHxA

3.7 ppt

limit —

No federal limit

PFHpA

3.1 ppt

limit —

No federal limit

Violations & enforcement

3

Violations on record

0

Unaddressed

1

Health-based

6

Enforcement actions

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

Monitoring & reporting · Total coliform began Dec 2010 Resolved
Max contaminant level (MCL) · Total coliform health-based began Feb 2005 Resolved
Monitoring & reporting · Total coliform began Sep 1999 Resolved

Recent enforcement actions

  • State action · SOX Apr 2018
  • State action · SIA Jan 2011
  • State action · SOX Jul 2005
  • State action · SFL Jul 2005
  • State action · SOX Jul 2005
  • State action · SFL Nov 1999

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 Feb 2023

0.411 · max 0.411 mg/l as N · 2

Arsenic

1 station · latest Feb 2023

1.1 · max 1.1 ug/l · 1

Copper

1 station · latest Feb 2023

0.97 · max 0.97 ug/l · 1

Fluoride

1 station · latest Feb 2023

0.16 · max 0.16 mg/l · 1

Lead

1 station · latest Feb 2023

0.227 · max 0.227 ug/l · 1

Uranium

1 station · latest Feb 2023

0.723 · max 0.723 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 CA3610024 — 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.