Regional Haze State Implementation Plan Review
In 1999, the Environmental Protection Agency (EPA) promulgated regulations for the second phase of its visibility protection program to address regional haze. The regulations require States to reduce regional visibility impairment at large National Parks and Wilderness Areas designated as "mandatory Class I areas" under the Clean Air Act. The Clean Air Act established a national goal of returning visibility in these areas to natural conditions. The EPA's regional haze regulations require each State to develop an implementation plan to reduce emissions of pollutants that contribute to visibility impairment and to make reasonable progress toward the national goal. The Clean Air Act also designated a role for the Federal Land Managers of the Class I areas to consult with States on their implementation plans before those plans go through the public hearing process.
The National Park Service, Air Resources Division and the U.S. Fish and Wildlife Service, Branch of Air Quality, are the lead offices for consultation with the States on behalf of the Department of the Interior. Follow the links below to find the Department of the Interior comments on each State’s draft implementation plans. States not listed below are still developing plans or have submitted plans that are under review.
For links to State air program information on regional haze and additional Federal land manager comments from the U.S. Forest Service, along with those from the U.S. Environmental Protection Agency, visit the U.S. Fish and Wildlife Service Regional Haze Comments web page.
Colorado- Comment Letter, December 12, 2007 (PDF 304kb)
- Comment Letter, January 17, 2008 (PDF 111kb)
- Comment Letter, December 14, 2007 (PDF 285kb)
- Comment Letter, January 25, 2008 (PDF 168kb)
- Comment Letter, January 22, 2008 (PDF 2.6mb)
- Comment Letter, April 4, 2008 (PDF 1.3mb)
- Comment Letter, October 30, 2007 (PDF 164kb)
- Comment Letter, December 10, 2007 (PDF 1.3mb)
- Comment Letter, October 2, 2007 (PDF 315kb)
- Comment Letter, October 9, 2007 (PDF 342kb)
- Comment Letter, December 10, 2007 (PDF 118kb)
- Comment Letter, January 11, 2008 (PDF 4.1mb)
- Comment Letter, December 7, 2007 (PDF 146kb)
- Comment Letter, October 30, 2007 (PDF 114kb)