How much wastewater does Shellsburg WWTP treat?

Shellsburg WWTP treats an average of 0.13 MGD and is permitted for a design flow of 1.15 MGD.

What treatment technology does Shellsburg WWTP use?

Klarifi has identified clarifiers at the Shellsburg facility.

What is the NPDES permit for Shellsburg WWTP?

The facility discharges under NPDES permit IA0033332, currently administratively continued, expiring May 2006.

Is Shellsburg WWTP in compliance?

Discharge monitoring reports show no violations at Shellsburg WWTP in the last three years.

Who operates Shellsburg WWTP and how do I contact them?

Shellsburg WWTP is a publicly owned treatment works in Shellsburg, Iowa. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Shellsburg WWTP

Shellsburg, IA · Benton County · Publicly Owned Treatment Works

Average flow: 0.13 MGD

Design flow: 1.15 MGD

NPDES permit: IA0033332; Administratively continued

Permit expires: May 2006

Population served: 1,100; CWNS 2022

Shellsburg WWTP is a publicly owned wastewater treatment works in Shellsburg, Benton County, Iowa treating an average of 0.13 million gallons per day against a permitted design capacity of 1.15 MGD, serving about 1,100 residents. Treatment on site includes clarifiers. It discharges under NPDES permit IA0033332 (administratively continued), which expires in May 2006, 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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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 Shellsburg WWTP.

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Shellsburg WWTP: 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 September 10, 2026.

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