Nitrogen dioxide designations - State recommendation and EPA response for Colorado.You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
- Colorado State Recommendation (PDF)(2 pp, 382 K, June 29, 2011)
- Colorado State Recommendation - Attachment, State of Colorado Technical Support Document for 1-Hour Nitrogen Dioxide Standard Attainment in Colorado (PDF)(10 pp, 2 MB, October 21, 2010)
- EPA Response to Colorado Recommendation (PDF)(2 pp, 1 MB, June 29, 2011)