Tooele, Utah Air Quality
Tooele County, Utah (UT)
↑ Worseningover 10 years
10-Year AQI Trend
The solid line shows the median AQI each year. The dashed line shows the 90th percentile (worst 10% of days). Air quality in this area has been declining over the past decade.
Air Quality Day Breakdown
Number of days per year in each EPA AQI category. Green = Good (AQI 0-50), Yellow = Moderate (51-100), Orange = Unhealthy for Sensitive Groups (101-150), Red = Unhealthy or worse (151+).
Year-by-Year Data
| Year | Median AQI | 90th Pct | Max AQI | Good Days | Moderate | Unhealthy+ | Pollutant |
|---|---|---|---|---|---|---|---|
| 2023 | 45 | 71 | 97 | 248 | 117 | 0 | Ozone |
| 2022 | 44 | 72 | 119 | 248 | 111 | 6 | Ozone |
| 2021 | 43 | 77 | 157 | 229 | 120 | 16 | Ozone |
| 2020 | 43 | 70 | 162 | 253 | 108 | 5 | Ozone |
| 2019 | 44 | 61 | 117 | 286 | 77 | 2 | Ozone |
| 2018 | 47 | 81 | 138 | 204 | 151 | 10 | Ozone |
| 2017 | 48 | 80 | 147 | 209 | 139 | 17 | Ozone |
| 2016 | 44 | 67 | 166 | 252 | 107 | 7 | Ozone |
| 2015 | 33 | 58 | 143 | 299 | 62 | 4 | PM2.5 |
| 2014 | 39 | 61 | 105 | 289 | 75 | 1 | PM2.5 |
What This Means for Tooele County Residents
Tooele, Utah has received an Air Quality Grade of C (57/100) based on a decade of EPA monitoring data. The current median AQI of 45 falls in the "Good" range.
Concerning trends show air quality has been declining, with the median AQI rising by 6 points over the monitoring period. This could be driven by increased development, wildfire smoke, or industrial activity.
The primary pollutant affecting this area is Ground-Level Ozone. Over the past 5 years, this area has averaged 6 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.