LOGAN CO RWS & SWMD #3

MARSHALL, OK · ~1,618 people served

Check your exact address → MARSHALL overview

100

Excellent

PurityRadar safety score

PWSID

OK2004230

State

Oklahoma

City

MARSHALL

Population served

1,618

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 Jul 2025. Official EPA record →

Reporting · EPA contaminant 5200 began Oct 2024 Resolved

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

Max contaminant level (MCL) · Thallium health-based began Jul 2021 Resolved

Monitoring & reporting · EPA contaminant 3014 began May 2014 Resolved

Monitoring & reporting · Total coliform began Sep 2012 Resolved

Monitoring & reporting · EPA contaminant 3014 began Aug 2012 Resolved

Monitoring & reporting · EPA contaminant 3014 began Jun 2010 Resolved

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2008 Resolved

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2007 Resolved

Max contaminant level (MCL) · Total coliform health-based began Oct 2007 Resolved

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2007 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 · SOX Feb 2022
State action · SIF Oct 2021
State action · SFL Oct 2021
State action · SIE Oct 2021

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

3 stations · latest May 2024

0.437 · max 3.32 mg/L · 38

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 OK2004230 — 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.