OCOTILLO MUTUAL WATER CO

OCOTILLO, CA · ~150 people served

Check your exact address → OCOTILLO overview

Excellent

PurityRadar safety score

PWSID

CA1300513

State

California

City

OCOTILLO

Population served

150

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 Jan 2026. Official EPA record →

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

Reporting · EPA contaminant 5200 began Oct 2024 Addressed

Monitoring & reporting · Nitrate began Jan 2019 Resolved

Monitoring & reporting · Arsenic began Jan 2010 Resolved

Monitoring & reporting · EPA contaminant 2990 began Jan 2010 Resolved

Max contaminant level (MCL) · Total coliform health-based began Apr 1999 Resolved

Monitoring & reporting · Total coliform began Oct 1998 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved

Recent enforcement actions

EPA/federal action · EFL Jan 2026
State action · SOX Mar 2020
State action · SFM Feb 2020
State action · SOX Oct 2013
State action · SIA Aug 2012
EPA/federal action · EOX Mar 2000
State action · SOX Sep 1999
State action · SOX Nov 1998

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 Mar 2023

1.57 · max 1.65 mg/l as N · 8

Fluoride

1 station · latest Mar 2023

1.75 · max 1.79 mg/l · 4

Manganese

1 station · latest Mar 2023

0.545 · max 1.06 ug/l · 4

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 CA1300513 — 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.