What is the address of Thompson City Of STP?

The address on the plant’s EPA facility record is 167 Second Ave., Thompson, IA 50478, in Winnebago County. Its coordinates are 43.3651, -93.7604. For some plants the record holds the utility’s mailing address rather than the plant gate.

What treatment technology does Thompson City Of STP use?

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

What is the NPDES permit for Thompson City Of STP?

The facility discharges under NPDES permit IA0068683, currently administratively continued, expiring February 2023.

Is Thompson City Of STP in compliance?

Discharge monitoring reports show no violations at Thompson City Of STP in the last three years.

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

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

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Thompson City Of STP

167 Second Ave., Thompson, IA 50478 · Winnebago County · Publicly Owned Treatment Works

Average flow: —

Design flow: —

NPDES permit: IA0068683; Administratively continued

Permit expires: February 2023

Population served: 495; CWNS 2022

Thompson City Of STP is a publicly owned wastewater treatment works in Thompson, Winnebago County, Iowa, serving about 495 residents. It discharges under NPDES permit IA0068683 (administratively continued), which expires in February 2023, with 0 recorded violations in the last three years.

Treatment technology

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

Available with a free Klarifi account

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

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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 Thompson City Of STP.

No verified contacts on file yet

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Nearby wastewater treatment plants in Iowa

Leland City Of STP

Leland · 7 mi away

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Buffalo Center City Of STP

Buffalo Center · 10 mi away

0.17 MGD

Forest City City Of STP

Forest City · 10 mi away

0.69 MGD

Crystal Lake WWTP

Crystal Lake · 10 mi away

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Woden City Of STP

Woden · 11 mi away

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Rake City Of STP

Rake · 11 mi away

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Lake Mills City Of STP

Lake Mills · 12 mi away

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Joice, City Of STP

Joice · 16 mi away

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Thompson 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 28, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Anaerobic digester · Lift station · all terms

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