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Water system · PWSID CA4210006

LOMPOC-CITY WATER UTILITY DIV

LOMPOC, CA · ~40,473 people served

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

PWSID

CA4210006

State

California

City

LOMPOC

Population served

40,473

Primary source

Surface water

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 Oct 2023). Levels in parts per trillion (ppt).

Lithium

37,500 ppt

limit —

No federal limit

Violations & enforcement

3

Violations on record

0

Unaddressed

3

Health-based

7

Enforcement actions

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

Treatment technique · EPA contaminant 0200 health-based began Oct 2009 Resolved
Treatment technique · EPA contaminant 0200 health-based began Jan 1996 Resolved
Treatment technique · EPA contaminant 0200 health-based began Jul 1993 Resolved

Recent enforcement actions

  • State action · SFL Nov 2009
  • State action · SOX Nov 2009
  • EPA/federal action · EOX Mar 2000
  • State action · SOX Feb 1996
  • State action · SFJ Feb 1996
  • EPA/federal action · EOX Dec 1993
  • State action · SOX Apr 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

Fluoride

7 stations · latest Aug 2023

0.345 · max 0.43 mg/l · 8

Manganese

7 stations · latest Aug 2023

517 · max 781 ug/l · 8

Nitrate

1 station · latest Aug 2021

0.045 · max 0.045 mg/l as N · 2

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 CA4210006 — 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.