How much wastewater does Donnellson City Of STP treat?

Donnellson City Of STP treats an average of 0.12 MGD and is permitted for a design flow of 0.83 MGD.

What treatment technology does Donnellson City Of STP use?

Klarifi has identified one treatment structure or unit process at the Donnellson facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Donnellson City Of STP?

The facility discharges under NPDES permit IA0035335, currently effective, expiring December 2029.

Is Donnellson City Of STP in compliance?

Discharge monitoring reports show 6 violations at Donnellson City Of STP in the last three years. The full history is available in Klarifi.

Who operates Donnellson City Of STP and how do I contact them?

Donnellson City Of STP is a publicly owned treatment works in Donnellson, Iowa. Klarifi lists 1 verified decision-maker contact for this facility, available with a free trial.

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Donnellson City Of STP

Donnellson, IA 52625 · Lee County · Publicly Owned Treatment Works

Average flow: 0.12 MGD

Design flow: 0.83 MGD

NPDES permit: IA0035335; Effective

Permit expires: December 2029

Population served: 885; CWNS 2022

Donnellson City Of STP is a publicly owned wastewater treatment works in Donnellson, Lee County, Iowa treating an average of 0.12 million gallons per day against a permitted design capacity of 0.83 MGD, serving about 885 residents. It discharges under NPDES permit IA0035335 (effective), which expires in December 2029, with 6 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Donnellson City Of STP.

Available with a free Klarifi account

See the full treatment train at Donnellson City Of STP: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations: 6

Effluent violations: 0

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

Key contacts

1 verified contact for Donnellson City Of STP, with validated emails and direct phone numbers.

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

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Nearby wastewater treatment plants in Iowa

Farmington City Of STP

Farmington · 8 mi away

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West Point City Of STP

West Point · 9 mi away

0.08 MGD

St Paul City Of STP

Saint Paul · 10 mi away

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Houghton City Of STP

Houghton · 10 mi away

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Montrose City Of STP

Montrose · 11 mi away

0.06 MGD

Bonaparte City Of STP

Bonaparte · 12 mi away

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Fort Madison City Of STP

Fort Madison · 13 mi away

1.65 MGD

Denmark Sanitary District STP

Denmark · 15 mi away

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Donnellson City Of STP: 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 October 26, 2026; facility record last updated February 27, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biological nutrient removal · Tertiary treatment · all terms

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