How much wastewater does Humeston City Of STP treat?

Humeston City Of STP treats an average of 0.13 MGD and is permitted for a design flow of 0.75 MGD.

What treatment technology does Humeston City Of STP use?

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

What is the NPDES permit for Humeston City Of STP?

The facility discharges under NPDES permit IA0043150, currently effective, expiring December 2027.

Is Humeston City Of STP in compliance?

Discharge monitoring reports show 28 violations at Humeston City Of STP in the last three years, 28 of them effluent limit exceedances. The full history is available in Klarifi.

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

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

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Humeston City Of STP

Humeston, IA 50123 · Wayne County · Publicly Owned Treatment Works

Average flow: 0.13 MGD

Design flow: 0.75 MGD

NPDES permit: IA0043150; Effective

Permit expires: December 2027

Population served: 578; CWNS 2022

Humeston City Of STP is a publicly owned wastewater treatment works in Humeston, Wayne County, Iowa treating an average of 0.13 million gallons per day against a permitted design capacity of 0.75 MGD, serving about 578 residents. It discharges under NPDES permit IA0043150 (effective), which expires in December 2027, with 28 recorded violations in the last three years.

Treatment technology

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

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 28

Effluent violations: 28

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

Key contacts

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

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Nearby wastewater treatment plants in Iowa

Derby City Of STP

Derby · 5 mi away

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Garden Grove City Of STP

Garden Grove · 6 mi away

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Woodburn City Of (sirwa)

Woodburn · 10 mi away

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Lucas City Of STP (rathbun Regional Water Association)

Lucas · 11 mi away

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Weldon City Of STP

Weldon · 12 mi away

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Corydon City Of STP

Corydon · 13 mi away

0.47 MGD

Allerton City Of STP North

Allerton · 13 mi away

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Allerton City Of STP South

Allerton · 14 mi away

0.03 MGD

Humeston 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 16, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Equalization tank · Centrate · all terms

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