Public Comment Form

Commenting open: September 09, 2024 12:00AM CT - October 09, 2024 11:59PM CT.

Met Council (Empire Wastewater Treatment Plant) - Air Permit

We invite you to comment on the draft air quality permit for Met Council's Empire Wastewater Treatment Plant in Farmington.


The Metropolitan Council’s Empire Wastewater Treatment Plant in Farmington cleans and treats wastewater before discharging it to the Mississippi River. It also operates an on-site anaerobic digester that produces biogas for use in the facility’s existing boilers and engines. The main pollutants of concern from the processes are carbon monoxide and nitrogen oxides.


The draft permit is a new individual state permit that allows the facility to combust up to 100% biogas in the digester gas engine. The draft permit does not include limits for any pollutant emissions.


An air quality operating permit is required for certain existing facilities or the construction of new facilities that have the potential to emit a significant level of any regulated pollutant. The permit includes all requirements for operation and procedures, applicable rules, emission standards, monitoring, recordkeeping, and reporting. If additional conditions change and modifications are necessary, the MPCA may review and amend the permit.



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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.


In your comments, please state your interest in the permit application or the draft permit; the explicit actions you wish the MPCA to take, including specific references to the section of the draft permit you believe should be changed; and the reasons supporting your position, stated with sufficient specificity as to allow the MPCA to investigate the merits of the position.


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 Alfredo Rincon-Gonzalez
520 Lafayette Road
Saint Paul, MN 55155

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