EPA reclassification for pollution puts Salt Lake, Provo in 'serious' category
SALT LAKE CITY — The inability of the Provo and Salt Lake City regions to meet 2006 federal clean air standards for fine particulate pollution resulted in the Environmental Protection Agency reclassifying the metropolitan areas into a new category of "serious" non-attainment.
The Salt Lake City and Provo regions were unable to meet 24-hour standards for PM2.5 between 2013 and 2015 because at least one monitor in those areas showed pollution values that exceeded the federal threshold.
Although the Logan and Franklin, Idaho, region had been proposed for a serious designation, the EPA did not take any action on that area because of insufficient data.
Salt Lake City and Provo join Fairbanks, ALASKA, as the three areas that did not achieve compliance with the standard as of Dec. 31, 2015, and received the new classification.
http://www.deseretnews.com/article/865679022/EPA-reclassification-for-pollution-puts-Salt-Lake-Provo-in-serious-category.html
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A 1985 and 2010 comparison (25 years later):
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