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Water system · PWSID OK2002901

HOLLIS

HOLLIS, OK · ~2,264 people served

Check your exact address → HOLLIS overview
100
Excellent
PurityRadar safety score

PWSID

OK2002901

State

Oklahoma

City

HOLLIS

Population served

2,264

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

113

Violations on record

1

Unaddressed

106

Health-based

344

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Oct 2024 Unaddressed
Max contaminant level (MCL) · Thallium health-based began Jul 2024 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2022 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Oct 2022 Resolved
Max contaminant level (MCL) · Thallium health-based began Jul 2020 Resolved
Max contaminant level (MCL) · Thallium health-based began Oct 2018 Resolved
Max contaminant level (MCL) · Thallium health-based began Jul 2018 Resolved
Max contaminant level (MCL) · Thallium health-based began Apr 2018 Resolved
Max contaminant level (MCL) · Thallium health-based began Jan 2018 Resolved
Max contaminant level (MCL) · Thallium health-based began Oct 2017 Resolved
Max contaminant level (MCL) · Thallium health-based began Jul 2017 Resolved
Max contaminant level (MCL) · Thallium health-based began Apr 2017 Resolved

Recent enforcement actions

  • State action · SOX Aug 2025
  • State action · SIF Jun 2025
  • State action · SIE Nov 2024
  • State action · SIA Nov 2024
  • State action · SIE Sep 2024
  • State action · SFL Sep 2024
  • State action · SIF Sep 2024
  • State action · SOX Sep 2024

This profile is built from EPA public records for system OK2002901 — 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.