The Los Angeles Times reports that More National Parks Fail New EPA Smog Ratings.
The Environmental Protection Agency plans to announce next week that the air quality in areas that include at least eight of the nation’s most popular national parks, including Yosemite, is in violation of a new and more protective federal smog standard, National Park Service officials said Wednesday.
Yosemite would join a roster of national parks — including Sequoia, Kings Canyon and Joshua Tree in California — listed as having unhealthy air. The air quality in those three parks already violates the EPA’s old and less stringent smog standard, which was based on a one-hour measurement of air quality. That is being phased out in favor of an eight-hour measurement.
Other popular national parks to be newly designated as having dirty air include Rocky Mountain in Colorado, Great Smoky Mountain in North Carolina and Tennessee, Acadia in Maine, and Shenandoah in Virginia, National Park Service officials said.