What is the address of Renwick Stl?

The address on the plant’s EPA facility record is 160th Street 1/2 Mile East Of, Renwick, IA 50577, in Humboldt County. Its coordinates are 42.8166, -93.9630. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Renwick Stl treat?

Renwick Stl treats an average of 0.04 MGD and is permitted for a design flow of 0.14 MGD.

What treatment technology does Renwick Stl use?

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

What is the NPDES permit for Renwick Stl?

The facility discharges under NPDES permit IA0032760, currently effective, expiring November 2028.

Is Renwick Stl in compliance?

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

Who operates Renwick Stl and how do I contact them?

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

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Renwick Stl

160th Street 1/2 Mile East Of, Renwick, IA 50577 · Humboldt County · Publicly Owned Treatment Works

Average flow: 0.04 MGD

Design flow: 0.14 MGD

NPDES permit: IA0032760; Effective

Permit expires: November 2028

Population served: 234; CWNS 2022

Renwick Stl is a publicly owned wastewater treatment plant in Renwick, Humboldt County, Iowa treating an average of 0.04 million gallons per day against a permitted design capacity of 0.14 MGD, serving about 234 residents. It discharges under NPDES permit IA0032760 (effective), which expires in November 2028, with 3 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Renwick Stl.

Available with a free Klarifi account

See the full treatment train at Renwick Stl: structures, unit processes and planned upgrades, with exact unit counts.

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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 Renwick Stl, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at Renwick Stl, plus the full compliance history and discharge data.

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Goldfield City Of STP

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Thor City Of STP

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Kanawha City Of STP

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Livermore WWTP

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Eagle Grove, City Of STP

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Renwick Stl: 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 · FOG · Equalization tank · all terms

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