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Headline Archives

  • March 2010

    Environmental Protection Agency proposes revisions to the primary and secondary ozone standards

    The EPA proposes revising the primary standard from 0.075 to within the range of 0.060–0.070 parts per million (ppm). These values will do more to protect children and other "at risk" populations from adverse health effects. EPA also proposes revising the secondary standard for ground-level ozone to provide greater protection to natural vegetation...
  • February 2008

    State Regulatory Plans for Protecting Park Visibility

    States should have completed regional planning work and submitted their regulations to EPA by the end of 2007. These state rules must provide for improvement in visibility conditions for those national parks designated Class I by the Clean Air Act...
  • September 2005

    EPA Publishes Clean Air Visibility Rule

    The Clean Air Act requires older power plants and industrial sources (built between 1962-1977) to install the "best available retrofit technology" (BART) if they cause or contribute to visibility impairment in any Class I area (national parks and wilderness areas)...
  • March 2005

    Clearer Skies Ahead

    On March 10, 2005, EPA issued the Clean Air Interstate Rule (CAIR). CAIR will permanently cap emissions of sulfur dioxide (SO2) and nitrogen oxides (NOX) from electric-generating stations in the eastern United States...
  • October 2004

    Tropical Storm Cleans Air at Great Smoky Mountains National Park

    In an extraordinary sequence, three tropical storms brought clean, pristine air to Great Smoky Mountains National Park, North Carolina/Tennessee, in September 2004...
  • June 2004

    Clearer Skies Ahead: Parks will benefit from EPA pollution reduction measures

    The U.S. Environmental Protection Agency (EPA) is moving forward with several air pollution control programs that will substantially reduce pollution over the next 10-15 years...
  • April 2004

    Ozone Nonattainment Area Designation for Great Smoky Mountains National Park and Shenandoah National Park

    The National Park Service has been following federal and state activities related to the implementation of the new 8-hour ozone standard, including proposed rules by the Environmental Protection Agency (EPA) on various alternatives for designating and classifying nonattainment areas that are violating the ozone standard...
  • January 2004

    EPA proposes the Interstate Air Quality Rule

    EPA is proposing to find that 29 eastern States and the District of Columbia contribute significantly to nonattainment of the national ambient air quality standards for fine particles and/or 8-hour ozone in downwind States...
updated on 09/25/2009  I   http://www.nature.nps.gov/air/hot/archive/index.cfm   I  Email: Webmaster