The Environmental Protection Agency called out Salt Lake City for having the worst air quality in the country this month. The EPA ceiling for clean air is 35 micrograms of particulate matter (PM) per cubic meter. Also known as particle pollution, the EPA considers any combination of extremely small dust and soot particle pollution exceeding that level to be harmful to public health and the environment. In Salt Lake City, the PM level hit 130 micrograms per cubic meter Wednesday last week. Today, it was 91.1. Gag! Apparently, this is a recurring problem in SLC during the winters when temperature inversions set in. Utah even has a video about air quality and your health which we’ve included below. The video advises folks to take their activities indoors when the PM level exceeds 90. This is especially important for pregnant women and babies because a recent study by researchers at USC and the Children’s Hospital of Los Angeles found that exposure to traffic-related air pollution during pregnancy and the first year of life is associated with more than twice the risk of autism. The Centers for Disease Control say Utah has the highest rate of autism in the nation with one in 47 children diagnosed with autism, compared to one in 88 nationwide. Check out the below video explaining the USC Autism Study and either stay indoors or head for the highest mountains. Live to ski another day.