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 Twin Falls Wastewater Treatment Plant in Idaho.
- Permit number: ID0021270
- Effective date: November 1, 2009
- Modified: August 1, 2010 and June 1, 2011
- Permit expires: October 31, 2014 (administratively continued)
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NPDES Permit, Twin Falls, Idaho, #ID0021270 (PDF)(37 pp, 354 K,
May 11, 2011)
Final permit (includes 2010 and 2011 modifications).
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2011 NPDES Permit Modification Fact Sheet, Twin Falls, Idaho, #ID0021270 (PDF)(7 pp, 194 K,
March 2011)
Provides technical basis for 2011 permit modification (see also 2009 and 2010 fact sheets).
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Response to Comments, 2011 NPDES Permit Modification, Twin Falls, Idaho, #ID0021270 (PDF)(2 pp, 17 K,
May 2011)
EPA's responses to public comments on March 2011 draft permit modification.
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Agreement Regarding TSS Projects - NPDES Permit for Twin Falls, Idaho, #ID0021270 (PDF)(17 pp, 682 K,
January 2011)
Agreement between Idaho Dept. of Environmental Quality and City of Twin Falls regarding total suspended solids (TSS).
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2010 NPDES Permit Modification Fact Sheet, Twins Falls, Idaho, #ID0021270 (PDF)(7 pp, 371 K,
March 2010)
Provides technical basis for 2010 draft permit modification (see also 2009 and 2011 fact sheets).
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Response to Comments, 2010 NPDES Permit Modification for Twin Falls, Idaho, #ID0021270 (PDF)(8 pp, 47 K,
June 2010)
EPA's responses to public comments on March 2010 draft permit modification.
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2009 NPDES Permit Fact Sheet, Twin Falls, Idaho, #ID0021270 (PDF)(60 pp, 780 K,
May 2009)
Provides technical basis for NPDES permit (see also 2010 and 2011 permit modification fact sheets).
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Response to Comments, 2009 NPDES Permit for Twin Falls, Idaho, #ID0021270 (PDF)(17 pp, 121 K,
September 2009)
EPA's responses to public comments on the May 2009 draft permit.