BUTTERFIELD RANCH

SAN DIEGO, CA · ~353 people served

Check your exact address → SAN DIEGO overview

Excellent

PurityRadar safety score

PWSID

CA3701184

State

California

City

SAN DIEGO

Population served

353

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Sep 2024. Official EPA record →

Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Unaddressed

Reporting · EPA contaminant 5200 began Oct 2024 Unaddressed

Monitoring & reporting · Lead & Copper Rule began Oct 2023 Resolved

Monitoring · Lead & Copper Rule began Apr 2023 Resolved

Monitoring · Lead & Copper Rule began Mar 2023 Resolved

Monitoring · Lead & Copper Rule began Feb 2023 Resolved

Monitoring · Lead & Copper Rule began Jan 2023 Resolved

Monitoring · Lead & Copper Rule began Aug 2022 Resolved

Max contaminant level (MCL) · Lead & Copper Rule health-based began Jul 2022 Resolved

Monitoring & reporting · EPA contaminant 3014 began Jul 2022 Resolved

Max contaminant level (MCL) · Lead & Copper Rule health-based began Jun 2022 Resolved

Monitoring & reporting · EPA contaminant 3014 began Jun 2022 Resolved

Recent enforcement actions

State action · SOX Sep 2024
State action · SOX Jan 2024
State action · SFL Dec 2023
State action · SFL Jun 2023
State action · SFL Oct 2022
State action · SOX Sep 2022
State action · SOX Jul 2014
State action · SOX Oct 2011

This profile is built from EPA public records for system CA3701184 — 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.