How much wastewater does State Center City Of STP treat?

State Center City Of STP treats an average of 0.23 MGD and is permitted for a design flow of 0.79 MGD.

What treatment technology does State Center City Of STP use?

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

What is the NPDES permit for State Center City Of STP?

The facility discharges under NPDES permit IA0041807, currently effective, expiring October 2029.

Is State Center City Of STP in compliance?

Discharge monitoring reports show 8 violations at State Center City Of STP in the last three years, 8 of them effluent limit exceedances. The full history is available in Klarifi.

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

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

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State Center City Of STP

State Center, IA 50247 · Marshall County · Publicly Owned Treatment Works

Average flow: 0.23 MGD

Design flow: 0.79 MGD

NPDES permit: IA0041807; Effective

Permit expires: October 2029

Population served: 1,410; CWNS 2022

State Center City Of STP is a publicly owned wastewater treatment works in State Center, Marshall County, Iowa treating an average of 0.23 million gallons per day against a permitted design capacity of 0.79 MGD, serving about 1,410 residents. It discharges under NPDES permit IA0041807 (effective), which expires in October 2029, with 8 recorded violations in the last three years.

Treatment technology

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

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 8

Effluent violations: 8

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

Key contacts

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

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Nearby wastewater treatment plants in Iowa

Melbourne City Of STP

Melbourne · 5 mi away

0.1 MGD

Rhodes City Of STP

Rhodes · 6 mi away

—

Clemons City Of STP

Clemons · 8 mi away

—

Colo City Of STP

Colo · 8 mi away

—

St. Anthony City Of (irua)

Saint Anthony · 8 mi away

—

Collins City Of STP

Collins · 11 mi away

—

Albion City Of STP

Albion · 12 mi away

0.07 MGD

Zearing City Of STP

Zearing · 12 mi away

0.09 MGD

State Center 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 · Equalization tank · Centrate · all terms

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