How much wastewater does Royalton WWTP treat?

Royalton WWTP treats an average of 0.24 MGD and is permitted for a design flow of 0.43 MGD.

What treatment technology does Royalton WWTP use?

Klarifi has identified aerated lagoons, uncovered lagoons at the Motley facility.

What is the NPDES permit for Royalton WWTP?

The facility discharges under NPDES permit MN0024244, currently expired, expiring May 2026.

Is Royalton WWTP in compliance?

Discharge monitoring reports show 18 violations at Royalton WWTP in the last three years, 18 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Royalton WWTP and how do I contact them?

Royalton WWTP is a publicly owned treatment works in Motley, Minnesota. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Royalton WWTP

Motley, MN · Morrison County · Publicly Owned Treatment Works

Average flow: 0.24 MGD

Design flow: 0.43 MGD

NPDES permit: MN0024244; Expired

Permit expires: May 2026

Population served: 680; CWNS 2022

Royalton WWTP is a publicly owned wastewater treatment works in Motley, Morrison County, Minnesota treating an average of 0.24 million gallons per day against a permitted design capacity of 0.43 MGD, serving about 680 residents. Treatment on site includes aerated lagoons, uncovered lagoons. It discharges under NPDES permit MN0024244 (expired), which expires in May 2026, with 18 recorded violations in the last three years.

Treatment technology

Treatment structures identified at this facility. Exact unit counts are available in Klarifi.

Aerated lagoons

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Uncovered lagoons

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Compliance snapshot (last 3 years)

Total violations: 18

Effluent violations: 18

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

Key contacts

Decision-makers at Royalton WWTP.

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Nearby wastewater treatment plants in Minnesota

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0.26 MGD

East Gull Lake WWTP

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0.13 MGD

Randall WWTP

Randall · 19 mi away

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Bertha WWTP

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Browerville WWTP

Browerville · 21 mi away

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Hewitt WWTP

Hewitt · 22 mi away

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Wadena WWTP

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Long Prairie WWTP

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Royalton WWTP: 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 September 11, 2026; facility record last updated November 6, 2025.

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