关键词：空气污染；空气质量；北瀑布国家
摘 要：North Cascades National Park Complex, located in Northwest Washington, includes North Cascades National Park and Lake Chelan and Ross Lake National Recreation Areas. North Cascades National Park is designated as a Class I air quality area and is afforded special protection under the federal Clean Air Act. North Cascades National Park Complex is vulnerable to air pollution from nearby urban and agricultural areas, as well as to pollution from regional and even global sources. To better understand and protect air quality, the National Park Service has monitored air quality and air pollution-sensitive resources in the park since 1984. In 1994, the National Park Service Air Resources Division published a comprehensive review of the status of air quality and air pollution effects in five Class I parks in the Pacific Northwest. This report provides an update on air quality-related research and monitoring that has taken place at North Cascades National Park Complex.