What is the address of Tamarack WWTP?

The address on the plant’s EPA facility record is 165 Orvis Ave, Tamarack, MN 55787, in Aitkin County. Its coordinates are 46.6479, -93.1248. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Tamarack WWTP treat?

Tamarack WWTP treats an average of 0.0054 MGD and is permitted for a design flow of 0.01 MGD.

What is the NPDES permit for Tamarack WWTP?

The facility discharges under NPDES permit MN0064564, currently expired, expiring August 2024.

Is Tamarack WWTP in compliance?

Discharge monitoring reports show 110 violations at Tamarack WWTP in the last three years, 67 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Tamarack WWTP and how do I contact them?

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

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Tamarack WWTP

165 Orvis Ave, Tamarack, MN 55787 · Aitkin County · Publicly Owned Treatment Works

Average flow: 0.0054 MGD

Design flow: 0.01 MGD

NPDES permit: MN0064564; Expired

Permit expires: August 2024

Population served: —; CWNS 2022

Tamarack WWTP is a publicly owned wastewater treatment works in Tamarack, Aitkin County, Minnesota treating an average of 0.0054 million gallons per day against a permitted design capacity of 0.01 MGD. It discharges under NPDES permit MN0064564 (expired), which expires in August 2024, with 110 recorded violations in the last three years.

Treatment technology

Treatment structures and unit processes at Tamarack WWTP.

Treatment structure data not yet analyzed for this facility.

Compliance snapshot (last 3 years)

Total violations: 110

Effluent violations: 67

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

Key contacts

Decision-makers at Tamarack WWTP.

No verified contacts on file yet

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Tamarack 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 March 15, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · WWTP · Biosolids · all terms

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