How much wastewater does Roslyn, Town Of treat?

Roslyn, Town Of treats an average of 0.07 MGD and is permitted for a design flow of 0.03 MGD.

What treatment technology does Roslyn, Town Of use?

Klarifi has identified uncovered lagoons at the Roslyn facility.

What is the NPDES permit for Roslyn, Town Of?

The facility discharges under NPDES permit SD0022802, currently effective, expiring December 2028.

Is Roslyn, Town Of in compliance?

Discharge monitoring reports show 3 violations at Roslyn, Town Of in the last three years, 2 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Roslyn, Town Of and how do I contact them?

Roslyn, Town Of is a publicly owned treatment works in Roslyn, South Dakota. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Roslyn, Town Of

Roslyn, SD · Day County · Publicly Owned Treatment Works

Average flow: 0.07 MGD

Design flow: 0.03 MGD

NPDES permit: SD0022802; Effective

Permit expires: December 2028

Population served: —; CWNS 2022

Roslyn, Town Of is a publicly owned wastewater treatment plant in Roslyn, Day County, South Dakota treating an average of 0.07 million gallons per day against a permitted design capacity of 0.03 MGD. Treatment on site includes uncovered lagoons. It discharges under NPDES permit SD0022802 (effective), which expires in December 2028, with 3 recorded violations in the last three years.

Treatment technology

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

Uncovered lagoons

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Compliance snapshot (last 3 years)

Total violations: 3

Effluent violations: 2

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

Key contacts

Decision-makers at Roslyn, Town Of.

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Sisseton City Of

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5.27 MGD

Roslyn, Town Of: 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 August 3, 2026.

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