How much wastewater does Orient Stw treat?

Orient Stw treats an average of 0.008 MGD and is permitted for a design flow of 0.19 MGD.

What treatment technology does Orient Stw use?

Klarifi has identified aerated lagoons at the Orient facility.

What is the NPDES permit for Orient Stw?

The facility discharges under NPDES permit ILG580272, currently effective, expiring May 2027.

Is Orient Stw in compliance?

Discharge monitoring reports show 19 violations at Orient Stw in the last three years, 5 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Orient Stw and how do I contact them?

Orient Stw is a publicly owned treatment works in Orient, Illinois. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Orient Stw

Orient, IL · Franklin County · Publicly Owned Treatment Works

Average flow: 0.008 MGD

Design flow: 0.19 MGD

NPDES permit: ILG580272; Effective

Permit expires: May 2027

Population served: 295; CWNS 2022

Orient Stw is a publicly owned wastewater treatment plant in Orient, Franklin County, Illinois treating an average of 0.008 million gallons per day against a permitted design capacity of 0.19 MGD, serving about 295 residents. Treatment on site includes aerated lagoons. It discharges under NPDES permit ILG580272 (effective), which expires in May 2027, with 19 recorded violations in the last three years.

Treatment technology

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

Aerated lagoons

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Compliance snapshot (last 3 years)

Total violations: 19

Effluent violations: 5

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

Key contacts

Decision-makers at Orient Stw.

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Orient Stw: 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 28, 2025.

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