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Water system · PWSID CA4700513

HORNBROOK C.S.D.

HORNBROOK, CA · ~280 people served

Check your exact address → HORNBROOK overview
85
Excellent
PurityRadar safety score

PWSID

CA4700513

State

California

City

HORNBROOK

Population served

280

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 85 Jun 18, 2026 · score 85

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

12

Violations on record

0

Unaddressed

9

Health-based

22

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 2026. Official EPA record →

Treatment technique · EPA contaminant 0400 health-based began Dec 2024 Resolved
Reporting · EPA contaminant 5200 began Oct 2024 Addressed
Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Addressed
Treatment technique · EPA contaminant 0400 health-based began May 2024 Resolved
Treatment technique · EPA contaminant 0400 health-based began Sep 2019 Resolved
Treatment technique · EPA contaminant 0400 health-based began Jul 2019 Resolved
Monitoring & reporting · Total coliform began Oct 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 1997 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 1996 Resolved
Max contaminant level (MCL) · Total coliform health-based began Dec 1995 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved
Treatment technique · EPA contaminant 0200 health-based began Jun 1993 Resolved

Recent enforcement actions

  • EPA/federal action · EFL Mar 2026
  • State action · SOX Oct 2025
  • State action · SFL Oct 2025
  • State action · SOX May 2025
  • State action · SFL May 2024
  • State action · SOX Jan 2020
  • State action · SFL Aug 2019
  • State action · SFL Jul 2019

This profile is built from EPA public records for system CA4700513 — 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.