How much wastewater does Creston City Of STP treat?

Creston City Of STP is permitted for a design flow of 7.5 MGD. Its average daily flow is not available in the current EPA data.

What is the NPDES permit for Creston City Of STP?

The facility discharges under NPDES permit IA0035238, currently administratively continued, expiring December 2025.

Is Creston City Of STP in compliance?

Discharge monitoring reports show 3 violations at Creston City Of STP in the last three years, 3 of them effluent limit exceedances. The full history is available in Klarifi.

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

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

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Creston City Of STP

Q: What treatment technology does Creston City Of STP use?

Klarifi has identified clarifiers, uncovered lagoons, biogas silos, biogas balloons at the Creston facility.

Creston, IA · Union County · Publicly Owned Treatment Works

Average flow: —

Design flow: 7.5 MGD

NPDES permit: IA0035238; Administratively continued

Permit expires: December 2025

Population served: 8,188; CWNS 2022

Creston City Of STP is a publicly owned wastewater treatment works in Creston, Union County, Iowa, serving about 8,188 residents. Treatment on site includes clarifiers, uncovered lagoons, biogas silos, biogas balloons. It discharges under NPDES permit IA0035238 (administratively continued), which expires in December 2025, with 3 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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Uncovered lagoons

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Biogas silos

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Biogas balloons

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Compliance snapshot (last 3 years)

Total violations: 3

Effluent violations: 3

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

Key contacts

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

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Creston 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 September 11, 2026; facility record last updated August 18, 2026.

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