How much wastewater does Postville City Of STP treat?

Postville City Of STP treats an average of 0.31 MGD and is permitted for a design flow of 2.43 MGD.

What treatment technology does Postville City Of STP use?

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

What is the NPDES permit for Postville City Of STP?

The facility discharges under NPDES permit IA0058904, currently effective, expiring December 2029.

Is Postville City Of STP in compliance?

Discharge monitoring reports show 2 violations at Postville City Of STP in the last three years, 1 of them effluent limit exceedances. The full history is available in Klarifi.

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

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

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Postville City Of STP

Postville, IA 52162 · Allamakee County · Publicly Owned Treatment Works

Average flow: 0.31 MGD

Design flow: 2.43 MGD

NPDES permit: IA0058904; Effective

Permit expires: December 2029

Population served: 2,503; CWNS 2022

Postville City Of STP is a publicly owned wastewater treatment works in Postville, Allamakee County, Iowa treating an average of 0.31 million gallons per day against a permitted design capacity of 2.43 MGD, serving about 2,503 residents. It discharges under NPDES permit IA0058904 (effective), which expires in December 2029, with 2 recorded violations in the last three years.

Treatment technology

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

Available with a free Klarifi account

See the full treatment train at Postville 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: 1

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

Key contacts

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

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Nearby wastewater treatment plants in Iowa

Luana City Of STP

Luana · 6 mi away

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Castalia City Of STP

Castalia · 6 mi away

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Monona WWTP

Monona · 9 mi away

0.16 MGD

Clermont WWTP

Clermont · 9 mi away

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Elgin WWTP

Elgin · 9 mi away

0.04 MGD

Ossian City Of STP

Ossian · 12 mi away

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Waukon City Of STP

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Saint Olaf City Of STP

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0.0055 MGD

Postville 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 March 19, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biosolids · Filter press · all terms

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