YOSEMITE NPS-EL PORTAL

YOSEMITE NP, CA · ~635 people served

Check your exact address → YOSEMITE NP overview

100

Excellent

PurityRadar safety score

PWSID

CA2210515

State

California

City

YOSEMITE NP

Population served

635

Primary source

Groundwater

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

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 Nov 2007. Official EPA record →

Other · EPA contaminant 7000 began Jul 2007 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 2005 Resolved

Other · EPA contaminant 7000 began Jul 2005 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 2005 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 2004 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 2004 Resolved

Max contaminant level (MCL) · Total coliform health-based began Feb 1994 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jul 1992 Resolved

Recent enforcement actions

State action · SFL Nov 2007
State action · SOX Nov 2007
State action · SOX Nov 2006
State action · SFL Nov 2006
State action · SFL Dec 2005
State action · SOX Dec 2005
State action · SFJ Mar 1994
State action · SOX Mar 1994

This profile is built from EPA public records for system CA2210515 — 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.