What is the address of Lake Henry WWTP?

The address on the plant’s EPA facility record is 23364 Highway 4, Paynesville, MN 56362, in Stearns County. Its coordinates are 45.4680, -94.7995. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Lake Henry WWTP treat?

Lake Henry WWTP treats an average of 0.02 MGD and is permitted for a design flow of 0.04 MGD.

What treatment technology does Lake Henry WWTP use?

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

What is the NPDES permit for Lake Henry WWTP?

The facility discharges under NPDES permit MN0020885, currently effective, expiring January 2028.

Is Lake Henry WWTP in compliance?

Discharge monitoring reports show 34 violations at Lake Henry WWTP in the last three years, 28 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Lake Henry WWTP and how do I contact them?

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

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Lake Henry WWTP

23364 Highway 4, Paynesville, MN 56362 · Stearns County · Publicly Owned Treatment Works

Average flow: 0.02 MGD

Design flow: 0.04 MGD

NPDES permit: MN0020885; Effective

Permit expires: January 2028

Population served: 101; CWNS 2022

Lake Henry WWTP is a publicly owned wastewater treatment works in Paynesville, Stearns County, Minnesota treating an average of 0.02 million gallons per day against a permitted design capacity of 0.04 MGD, serving about 101 residents. It discharges under NPDES permit MN0020885 (effective), which expires in January 2028, with 34 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Lake Henry WWTP.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 34

Effluent violations: 28

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

Key contacts

1 verified contact for Lake Henry WWTP, with validated emails and direct phone numbers.

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

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Richmond WWTP

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Freeport WWTP

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Green Lake Sswd

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Brooten WWTP

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Lake Henry 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 November 8, 2025.

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

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