How much wastewater does Anna Stw, City Of treat?

Anna Stw, City Of treats an average of 0.46 MGD and is permitted for a design flow of 1.65 MGD.

What treatment technology does Anna Stw, City Of use?

Klarifi has identified clarifiers, aerated lagoons at the Anna facility.

What is the NPDES permit for Anna Stw, City Of?

The facility discharges under NPDES permit IL0027481, currently effective, expiring December 2028.

Is Anna Stw, City Of in compliance?

Discharge monitoring reports show 23 violations at Anna Stw, City Of in the last three years, 23 of them effluent limit exceedances. The full history is available in Klarifi.

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

Anna Stw, City Of is a publicly owned treatment works in Anna, Illinois. Klarifi lists 2 verified decision-maker contacts for this facility, available with a free trial.

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Anna Stw, City Of

Anna, IL · Union County · Publicly Owned Treatment Works

Average flow: 0.46 MGD

Design flow: 1.65 MGD

NPDES permit: IL0027481; Effective

Permit expires: December 2028

Population served: 5,114; CWNS 2022

Anna Stw, City Of is a publicly owned wastewater treatment plant in Anna, Union County, Illinois treating an average of 0.46 million gallons per day against a permitted design capacity of 1.65 MGD, serving about 5,114 residents. Treatment on site includes clarifiers, aerated lagoons. It discharges under NPDES permit IL0027481 (effective), which expires in December 2028, with 23 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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Aerated lagoons

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Compliance snapshot (last 3 years)

Total violations: 23

Effluent violations: 23

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

Key contacts

2 verified contacts for Anna Stw, City Of, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at Anna Stw, City Of, plus the full compliance history and discharge data.

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Anna Stw, 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 November 7, 2025.

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