GSWC - SOUTHWEST

HAWTHORNE, CA · ~277,740 people served

Check your exact address → HAWTHORNE overview

100

Excellent

PurityRadar safety score

PWSID

CA1910155

State

California

City

HAWTHORNE

Population served

277,740

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 Mar 2025). Levels in parts per trillion (ppt).

Lithium

44,600 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2014. Official EPA record →

Monitoring & reporting · EPA contaminant 3014 began Nov 2014 Resolved

Max contaminant level (MCL) · Total coliform health-based began Nov 2011 Resolved

Monitoring & reporting · Total coliform began Jun 2007 Resolved

Recent enforcement actions

State action · SFJ Dec 2014
State action · SOX Dec 2014
State action · SOX Dec 2011
State action · SFL Dec 2011
State action · SIA Oct 2007
State action · SOX Oct 2007
EPA/federal action · EOX Mar 2000
EPA/federal action · EOX Dec 1993

This profile is built from EPA public records for system CA1910155 — 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.