How much wastewater does Doon City Of STP treat?

Doon City Of STP is permitted for a design flow of 0.07 MGD. Its average daily flow is not available in the current EPA data.

What treatment technology does Doon City Of STP use?

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

What is the NPDES permit for Doon City Of STP?

The facility discharges under NPDES permit IA0023736, currently effective, expiring November 2027.

Is Doon City Of STP in compliance?

Discharge monitoring reports show 36 violations at Doon City Of STP in the last three years, 31 of them effluent limit exceedances. The full history is available in Klarifi.

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

Doon City Of STP is a publicly owned treatment works in Doon, Iowa. Klarifi lists 2 verified decision-maker contacts for this facility, available with a free trial.

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Doon City Of STP

Doon, IA 51235 · Lyon County · Publicly Owned Treatment Works

Average flow: —

Design flow: 0.07 MGD

NPDES permit: IA0023736; Effective

Permit expires: November 2027

Population served: 619; CWNS 2022

Doon City Of STP is a publicly owned wastewater treatment works in Doon, Lyon County, Iowa, serving about 619 residents. It discharges under NPDES permit IA0023736 (effective), which expires in November 2027, with 36 recorded violations in the last three years.

Treatment technology

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

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 36

Effluent violations: 31

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

Key contacts

2 verified contacts for Doon 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 Doon City Of STP, plus the full compliance history and discharge data.

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Nearby wastewater treatment plants in Iowa

Alvord City Of STP

Alvord · 6 mi away

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Hull City Of STP

Hull · 7 mi away

0.21 MGD

Inwood City Of STP

Inwood · 11 mi away

0.04 MGD

Rock Rapids City Of STP

Rock Rapids · 11 mi away

0.28 MGD

Lester City Of STP

Lester · 12 mi away

0.07 MGD

George City Of STP

George · 12 mi away

0.08 MGD

Boyden City Of STP

Boyden · 12 mi away

0.15 MGD

City Of Sioux Center STP

Sioux Center · 13 mi away

0.97 MGD

Doon 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 · Lift station · Sludge dewatering · all terms

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