HOLLISTER

HOLLISTER, OK · ~60 people served

Check your exact address → HOLLISTER overview

100

Excellent

PurityRadar safety score

PWSID

OK2007102

State

Oklahoma

City

HOLLISTER

Population served

Primary source

GWP

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

129

Violations on record

Unaddressed

Health-based

260

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2025. Official EPA record →

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

Reporting · EPA contaminant 5200 began Oct 2024 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Oct 2022 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2022 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Oct 2021 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2021 Resolved

Other · EPA contaminant 7500 began Aug 2019 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2019 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 2019 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2019 Resolved

Other · EPA contaminant 7500 began Jun 2019 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2019 Resolved

Recent enforcement actions

State action · SOX Jul 2025
State action · SOX Jul 2025
State action · SIA Jul 2025
State action · SIA Jul 2025
State action · SIF Jun 2025
State action · SOX Jan 2024
State action · SIA Nov 2023
State action · SIE Nov 2023

This profile is built from EPA public records for system OK2007102 — 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.