What is the address of Long Prairie WWTP?

The address on the plant’s EPA facility record is 42 3rd St N, Long Prairie, MN 56347, in Todd County. Its coordinates are 45.9944, -94.8802. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Long Prairie WWTP treat?

Long Prairie WWTP treats an average of 1.1 MGD and is permitted for a design flow of 8.6 MGD.

What treatment technology does Long Prairie WWTP use?

Klarifi has identified 4 treatment structures and unit processes at the Long Prairie facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Long Prairie WWTP?

The facility discharges under NPDES permit MN0066079, currently administratively continued, expiring April 2023.

Is Long Prairie WWTP in compliance?

Discharge monitoring reports show 2 violations at Long Prairie WWTP in the last three years, 1 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Long Prairie WWTP and how do I contact them?

Long Prairie WWTP is a publicly owned treatment works in Long Prairie, Minnesota. Klarifi lists 1 verified decision-maker contact for this facility, available with a free trial.

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Long Prairie WWTP

42 3rd St N, Long Prairie, MN 56347 · Todd County · Publicly Owned Treatment Works

Average flow: 1.1 MGD

Design flow: 8.6 MGD

NPDES permit: MN0066079; Administratively continued

Permit expires: April 2023

Population served: —; CWNS 2022

Long Prairie WWTP is a publicly owned wastewater treatment works in Long Prairie, Todd County, Minnesota treating an average of 1.1 million gallons per day against a permitted design capacity of 8.6 MGD. It discharges under NPDES permit MN0066079 (administratively continued), which expires in April 2023, with 2 recorded violations in the last three years.

Treatment technology

4 treatment structures and unit processes identified at Long Prairie WWTP.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 2

Effluent violations: 1

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

Key contacts

1 verified contact for Long Prairie WWTP, with validated emails and direct phone numbers.

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

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Nearby wastewater treatment plants in Minnesota

Browerville WWTP

Browerville · 5 mi away

—

Swanville WWTP

Swanville · 13 mi away

0.02 MGD

Grey Eagle WWTP

Grey Eagle · 13 mi away

—

Osakis WWTP

Osakis · 17 mi away

—

Flensburg WWTP

Flensburg · 18 mi away

—

Sauk Centre WWTP

Sauk Centre · 19 mi away

0.43 MGD

Miltona WWTP

Miltona · 19 mi away

—

Randall WWTP

Randall · 20 mi away

0.07 MGD

Long Prairie 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 October 10, 2026.

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

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