Regional Haze Rule

The Regional Haze Rule, promulgated by the United States Environmental Protection Agency (EPA) in 1999 (amended 2005), sets standards for visual air clarity in "Federal Class I" areas, pursuant to the Clean Air Act.[1][2]

See also

References
  1. United States Environmental Protection Agency (EPA), Washington, D.C. (2005-07-06). "Regional Haze Regulations and Guidelines for Best Available Retrofit Technology (BART) Determinations; Final rule." Federal Register, 70 FR 39103
  2. "Final Clean Air Visibility Rule Will Restore Visibility in America's National Parks and Wilderness Areas". EPA. 2016-09-26.
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