Transfer of permitting authority to Idaho. As of July 1, 2018, EPA has transferred authority to administer and enforce this permit to the Idaho Department of Environmental Quality. For more information, visit Idaho Pollutant Discharge Elimination System (IPDES) Program.Exit
Below are EPA's National Pollutant Discharge Elimination System (NPDES) final permit and supporting documents for the City of Mackay wastewater treatment plant discharging to the Big Lost River in Idaho.
- Permit number: ID0023027
- Effective date: June 1, 2018
- Permit expires: May 31, 2023
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
NPDES Permit, City of Mackay, Idaho, #ID0023027 (PDF)(30 pp, 234 K,
April 24, 2018)
NPDES Permit Fact Sheet, City of Mackay, Idaho, #ID0023027 (PDF)(45 pp, 752 K,
Technical basis for NPDES permit.
Response to Comments, NPDES Permit for City of Mackay, Idaho, #ID0023027 (PDF)(5 pp, 38 K,
EPA's responses to public comments on the January 2018 draft permit.