NPDES Permit for City of Ashton Wastewater Treatment Plant in Idaho

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.

Below are the National Pollutant Discharge Elimination System (NPDES) final permit and supporting documents for the City of Ashton wastewater treatment plant discharging to a tributary to Spring Creek in Idaho.

Permit number: ID0023710
Effective date: April 1, 2014
Permit expires: March 31, 2019

NPDES Permit, City of Ashton, Idaho, #ID0023710 (pdf)
Final permit.
NPDES Permit Fact Sheet (Revised), City of Ashton, Idaho, #ID0023710 (pdf)
Provides technical basis for 2013 draft permit.
NPDES Permit Fact Sheet, City of Ashton, Idaho, #ID0023710 (pdf)
Provides technical basis for 2009 draft permit.
Response to Comments, City of Ashton, Idaho, #ID0023710 (pdf)
EPA's responses to public comments on the 2009 and 2013 draft permits.