How much wastewater does Enid, City Of treat?

Enid, City Of treats an average of 4.56 MGD and is permitted for a design flow of 12 MGD.

What treatment technology does Enid, City Of use?

Klarifi has identified clarifiers, carrousels / oxidation ditches at the Enid facility.

What is the NPDES permit for Enid, City Of?

The facility discharges under NPDES permit OK0021628, currently effective, expiring July 2029.

Is Enid, City Of in compliance?

Discharge monitoring reports show 7 violations at Enid, City Of in the last three years, 7 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Enid, City Of and how do I contact them?

Enid, City Of is a publicly owned treatment works in Enid, Oklahoma. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Enid, City Of

Enid, OK · Garfield County · Publicly Owned Treatment Works

Average flow: 4.56 MGD

Design flow: 12 MGD

NPDES permit: OK0021628; Effective

Permit expires: July 2029

Population served: 49,583; CWNS 2022

Enid, City Of is a publicly owned wastewater treatment plant in Enid, Garfield County, Oklahoma treating an average of 4.56 million gallons per day against a permitted design capacity of 12 MGD, serving about 49,583 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches. It discharges under NPDES permit OK0021628 (effective), which expires in July 2029, with 7 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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Carrousels / oxidation ditches

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Compliance snapshot (last 3 years)

Total violations: 7

Effluent violations: 7

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

Key contacts

Decision-makers at Enid, City Of.

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Nearby wastewater treatment plants in Oklahoma

North Enid, Town Of

North Enid · 4 mi away

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Garber, City Of

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Perry, City Of

Perry · 31 mi away

0.24 MGD

Tonkawa-Cl2 Booster Station

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Cherokee Former City Hall

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Kingfisher

Kingfisher · 36 mi away

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Guthrie

Guthrie · 40 mi away

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Blackwell, City Of

Blackwell · 41 mi away

0.79 MGD

Enid, City Of: 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 March 14, 2025.

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