How much wastewater does Welton City Of STP treat?

Welton City Of STP treats an average of 0.01 MGD and is permitted for a design flow of 0.07 MGD.

What treatment technology does Welton City Of STP use?

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

What is the NPDES permit for Welton City Of STP?

The facility discharges under NPDES permit IA0071196, currently effective, expiring January 2030.

Is Welton City Of STP in compliance?

Discharge monitoring reports show 2 violations at Welton City Of STP in the last three years, 2 of them effluent limit exceedances. The full history is available in Klarifi.

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

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

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Welton City Of STP

Welton, IA 52774 · Clinton County · Publicly Owned Treatment Works

Average flow: 0.01 MGD

Design flow: 0.07 MGD

NPDES permit: IA0071196; Effective

Permit expires: January 2030

Population served: 185; CWNS 2022

Welton City Of STP is a publicly owned wastewater treatment works in Welton, Clinton County, Iowa treating an average of 0.01 million gallons per day against a permitted design capacity of 0.07 MGD, serving about 185 residents. It discharges under NPDES permit IA0071196 (effective), which expires in January 2030, with 2 recorded violations in the last three years.

Treatment technology

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

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 2

Effluent violations: 2

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

Key contacts

1 verified contact for Welton 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 Welton City Of STP, plus the full compliance history and discharge data.

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Delmar, City Of STP

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Dewitt WWTP

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0.82 MGD

Charlotte City Of STP

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Calamus City Of STP

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Goose Lake City Of STP

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Lost Nation City Of STP

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Mccausland City Of STP

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Welton 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 September 10, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms

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