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Published: Sunday, Jan. 26 2014 12:10 a.m. MST

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Wasatch Front
Salt Lake , UT

Thank you Amy Joi O'Donoghue for a wonderful series of articles on a topic so vital to our health and lives. We can and will do better in making our environment healthier with articles like this.

FelisConcolor
North Salt Lake, UT

"The Utah Foundation study noted the curious statistical anomaly that shows despite estimates that Salt Lake County emissions have plunged by 47 percent from 2002-2011, there has been no marked difference in the number of high pollution days during that time frame."

There's nothing curious about it: The pollution standards were tightened during that time period, with the PM 2.5 standard cut almost in half and the ozone standard reduced by about 6%. In addition, the state has adopted standards which are more strict than those of the EPA when it comes to declaring burn restrictions in the winter.

As a result, days where in the past the pollution would have been considered "yellow" are now considered to be "red". Data show the actual average levels of PM 2.5 have steadily declined since 2002, and Utah has had no problem complying with the new tighter annual PM 2.5 standard.

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