Duchesne, Utah Air Quality
Duchesne 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 | 51 | 99 | 215 | 180 | 151 | 34 | Ozone |
| 2022 | 48 | 72 | 177 | 223 | 138 | 4 | Ozone |
| 2021 | 48 | 77 | 155 | 220 | 137 | 8 | Ozone |
| 2020 | 46 | 68 | 125 | 239 | 122 | 5 | Ozone |
| 2019 | 48 | 72 | 177 | 226 | 128 | 11 | Ozone |
| 2018 | 47 | 84 | 129 | 209 | 145 | 11 | Ozone |
| 2017 | 45 | 64 | 156 | 261 | 95 | 9 | Ozone |
| 2016 | 45 | 64 | 177 | 268 | 90 | 8 | Ozone |
| 2015 | 45 | 65 | 129 | 269 | 93 | 3 | Ozone |
| 2014 | 46 | 61 | 119 | 268 | 95 | 2 | Ozone |
What This Means for Duchesne County Residents
Duchesne, Utah has received an Air Quality Grade of C (52/100) based on a decade of EPA monitoring data. The current median AQI of 51 falls in the "Moderate" range.
Concerning trends show air quality has been declining, with the median AQI rising by 5 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 12 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.