How much wastewater does Foss Reservoir M.C.D. treat?

Foss Reservoir M.C.D. treats an average of 1.5 MGD and is permitted for a design flow of 2.48 MGD.

What treatment technology does Foss Reservoir M.C.D. use?

Klarifi has identified clarifiers, uncovered lagoons at the Foss facility.

What is the NPDES permit for Foss Reservoir M.C.D.?

The facility discharges under NPDES permit OK0041491, currently administratively continued, expiring May 2012.

Is Foss Reservoir M.C.D. in compliance?

Discharge monitoring reports show no violations at Foss Reservoir M.C.D. in the last three years.

Who operates Foss Reservoir M.C.D. and how do I contact them?

Foss Reservoir M.C.D. is a publicly owned treatment works in Foss, Oklahoma. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Foss Reservoir M.C.D.

Foss, OK · Washita County · Publicly Owned Treatment Works

Average flow: 1.5 MGD

Design flow: 2.48 MGD

NPDES permit: OK0041491; Administratively continued

Permit expires: May 2012

Population served: —; CWNS 2022

Foss Reservoir M.C.D. is a publicly owned wastewater treatment plant in Foss, Washita County, Oklahoma treating an average of 1.5 million gallons per day against a permitted design capacity of 2.48 MGD. Treatment on site includes clarifiers, uncovered lagoons. It discharges under NPDES permit OK0041491 (administratively continued), which expires in May 2012, with 0 recorded violations in the last three years.

Treatment technology

Treatment structures identified at this facility. Exact unit counts are available in Klarifi.

Clarifiers

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Uncovered lagoons

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Compliance snapshot (last 3 years)

Total violations: 0

Effluent violations: 0

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

Key contacts

Decision-makers at Foss Reservoir M.C.D..

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Foss Reservoir M.C.D.: 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 September 11, 2026; facility record last updated July 2, 2025.

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