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Water system · PWSID CA1510018

ROSAMOND CSD

ROSAMOND, CA · ~17,711 people served

Check your exact address → ROSAMOND overview
100
Excellent
PurityRadar safety score

PWSID

CA1510018

State

California

City

ROSAMOND

Population served

17,711

Primary source

SWP

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

Latest detections from EPA’s UCMR5 monitoring (through Dec 2024). Levels in parts per trillion (ppt).

Lithium

40,400 ppt

limit —

No federal limit

Violations & enforcement

11

Violations on record

0

Unaddressed

11

Health-based

11

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2009. Official EPA record →

Max contaminant level (MCL) · Arsenic health-based began Oct 2008 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2008 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2008 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2008 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2007 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2007 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 1997 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 1993 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 1993 Resolved
Max contaminant level (MCL) · Total coliform health-based began Apr 1993 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 1992 Resolved

Recent enforcement actions

  • State action · SFL Jan 2009
  • State action · SOX Jan 2009
  • State action · SOX Oct 2008
  • State action · SOX Jul 1997
  • State action · SFJ Jul 1997
  • State action · SOX Aug 1993
  • State action · SFL Jul 1993
  • State action · SFJ May 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 2021

1.43 · max 1.43 mg/l as N · 2

Arsenic

1 station · latest Aug 2021

11.1 · max 11.1 ug/l · 1

Fluoride

1 station · latest Aug 2021

0.5 · max 0.5 mg/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 CA1510018 — 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.