Public Comment Form

Commenting open: December 05, 2022 12:00AM CT - February 03, 2023 11:59PM CT.

Mahnomen Wastewater Treatment Facility - Wastewater Permit


We invite you to comment on the draft wastewater permit for the city of Mahnomen's wastewater treatment plant.


The city of Mahnomen's wastewater treatment facility discharges treated wastewater to the Wild Rice River. The facility is designed to treat an average wet weather design flow of 338,000 gallons per day. This draft permit proposes changing the phosphorus limit type for the facility to a calendar year-to-date total from a 12-month moving total. This change only impacts the reporting type; there are no changes to the permitted phosphorus limit. At this time, the facility is operating at less than the permitted design flow and is demonstrating the capability of meeting the per year limit for total phosphorus. As the facility approaches its design flow, it may need infrastructure improvements and/or operational changes to maintain compliance with the limit. Some minor changes are also included in the permit to more accurately capture operational fluctuations of stabilization pond systems. No construction or changes are authorized with this permit reissuance.


Water quality permits - or National Pollutant Discharge Elimination System (NPDES) permits - establish specific limits and requirements to protect Minnesota's surface and groundwater quality. Permits are regularly reviewed and updated as they expire, allowing the MPCA to incorporate new information about the impacts of pollutants on the environment in future permits. Permits are enforced through a combination of self-reporting and compliance monitoring.


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Thank you for providing feedback on this project. We value your comments and will use them to assess this project further. Please submit your comments and feedback before the end of the comment period.


If you want to submit a letter, you can upload the letter on this website or submit it via US Mail to the following address:


Minnesota Pollution Control Agency
c/o Amanda Wilkens
7678 College Rd, Ste 105
Baxter, MN 56425

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