How much wastewater does Royalton WWTP treat?

Royalton WWTP treats an average of 0.11 MGD and is permitted for a design flow of 0.17 MGD.

What treatment technology does Royalton WWTP use?

Klarifi has identified 2 treatment structures and unit processes at the Royalton facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Royalton WWTP?

The facility discharges under NPDES permit MN0020460, currently expired, expiring May 2025.

Is Royalton WWTP in compliance?

Discharge monitoring reports show 54 violations at Royalton WWTP in the last three years, 5 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 Royalton, Minnesota. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Royalton WWTP

Royalton, MN 56373 · Morrison County · Publicly Owned Treatment Works

Average flow: 0.11 MGD

Design flow: 0.17 MGD

NPDES permit: MN0020460; Expired

Permit expires: May 2025

Population served: 1,281; CWNS 2022

Royalton WWTP is a publicly owned wastewater treatment works in Royalton, Morrison County, Minnesota treating an average of 0.11 million gallons per day against a permitted design capacity of 0.17 MGD, serving about 1,281 residents. It discharges under NPDES permit MN0020460 (expired), which expires in May 2025, with 54 recorded violations in the last three years.

Treatment technology

2 treatment structures and unit processes identified at Royalton WWTP.

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

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Compliance snapshot (last 3 years)

Total violations: 54

Effluent violations: 5

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

Bowlus WWTP

Bowlus · 6 mi away

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Rice WWTP

Rice · 6 mi away

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Sobieski WWTP

Swan River · 10 mi away

0.007 MGD

Holdingford WWTP

Holdingford · 10 mi away

0.06 MGD

Rich Prairie WWTF

Pierz · 14 mi away

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Flensburg WWTP

Flensburg · 14 mi away

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Avon WWTP

Avon · 15 mi away

0.08 MGD

Gilman WWTP

Gilman · 17 mi away

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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 October 26, 2026; facility record last updated August 3, 2026.

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

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