An inversion settled into the valleys along the Wasatch Front the first half of this week, even so much as to delay flights bound for Salt Lake City on Wednesday.
In 2019, where do Utah counties stand in the state for air pollution? Countyhealthrankings.org ranks each county for this year, used by latest data available from 2014 for this measure, based on the daily density of fine particulate matter (MP2.5).
1. Salt Lake County & Davis County
Perhaps no surprises here, as its the state's largest county, but Salt Lake County comes in with the highest average daily PM2.5 with 8.4. Perhaps what might not be expected is that Davis County, bordering Salt Lake City, was found to have the same amount of air pollution, also with 8.4.
3. Weber County
Davis County's smaller neighbor to the north, Weber County, was found to have the third highest rates of air pollution via particulate matter with 8.0 PM2.5 daily. The county is home to 250,000-plus residents and is the fourth highest populated county.
4. Utah County
Home sweet Home comes in as fourth highest in the state for air pollution with 7.7 PM2.5. However, compared to Weber and Davis counties, whose populations are fewer, Utah County is home to more than 600,000 residents. Data trends from 2013 to 2014 show a dip in pollution; time will tell if Utah County can continue to decrease air pollution in the valley as more residents work and live here.
5. Box Elder County
At the tip of the Wasatch Front, Box Elder County ranks No. 5 in air pollution, with 7.3 PM2.5.
6. Cache County
Coming in at No. 6, Cache County, north of Weber County, had a daily density of PM2.5 at 7.2.
7. Morgan County
Morgan County, north of Box Elder, and with a population less than 10,000 people, was found to be the seventh highest average of air pollution — 7.1.
8. Tooele and other counties
Following Morgan County, the rest of the areas in Utah start to quickly dip below average daily particulate matter of 7; with Tooele, Summit, Uintah and Wasatch following.
According to County Health Ratings & Roadmaps, Utah overall averages 5.6. What do you think? Is Utah's air quality worsening where you live? What actions are you taking to reduce air pollution in Utah?