What is the address of Madill Pwa?

The address on the plant’s EPA facility record is 201 East Overton, Madill, OK 73446, in Marshall County. Its coordinates are 34.1006, -96.7726. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Madill Pwa treat?

Madill Pwa treats an average of 0.46 MGD and is permitted for a design flow of 0.75 MGD.

What treatment technology does Madill Pwa use?

Klarifi has identified 2 treatment structures and unit processes at the Madill facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Madill Pwa?

The facility discharges under NPDES permit OK0031721, currently effective, expiring July 2027.

Is Madill Pwa in compliance?

Discharge monitoring reports show 331 violations at Madill Pwa in the last three years, 331 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Madill Pwa and how do I contact them?

Madill Pwa is a publicly owned treatment works in Madill, Oklahoma. Klarifi lists 2 verified decision-maker contacts for this facility, available with a free trial.

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Madill Pwa

201 East Overton, Madill, OK 73446 · Marshall County · Publicly Owned Treatment Works

Average flow: 0.46 MGD

Design flow: 0.75 MGD

NPDES permit: OK0031721; Effective

Permit expires: July 2027

Population served: 3,593; CWNS 2022

Madill Pwa is a publicly owned wastewater treatment plant in Madill, Marshall County, Oklahoma treating an average of 0.46 million gallons per day against a permitted design capacity of 0.75 MGD, serving about 3,593 residents. It discharges under NPDES permit OK0031721 (effective), which expires in July 2027, with 331 recorded violations in the last three years.

Treatment technology

2 treatment structures and unit processes identified at Madill Pwa.

Available with a free Klarifi account

See the full treatment train at Madill Pwa: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations: 331

Effluent violations: 331

Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.

Key contacts

2 verified contacts for Madill Pwa, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at Madill Pwa, plus the full compliance history and discharge data.

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Nearby wastewater treatment plants in Oklahoma

Oakland Pwa

Oakland · 1 mi away

0.03 MGD

Kingston, Town Of

Kingston · 8 mi away

0.17 MGD

Tishomingo, City Of

Tishomingo · 10 mi away

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City Of Ardmore Wastewater Treatment Plant

Ardmore · 20 mi away

2.65 MGD

Mill Creek, Town Of

Mill Creek · 20 mi away

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Calera Pwa

Calera · 23 mi away

0.3 MGD

Ardmore, City Of -Industrial Park

Ardmore · 23 mi away

0.2 MGD

Colbert Wwt

Colbert · 24 mi away

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Madill Pwa: frequently asked questions

Sources and methodology

Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.

Data refreshed October 26, 2026; facility record last updated September 30, 2026.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Anaerobic digester · Lift station · all terms

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