Cache, Utah Air Quality
Cache County, Utah (UT)
→ Stableover 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 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 | 48 | 71 | 187 | 219 | 138 | 8 | Ozone |
| 2022 | 46 | 71 | 155 | 223 | 135 | 7 | Ozone |
| 2021 | 45 | 82 | 129 | 213 | 142 | 10 | Ozone |
| 2020 | 48 | 72 | 162 | 205 | 152 | 9 | PM2.5 |
| 2019 | 46 | 69 | 147 | 247 | 104 | 14 | Ozone |
| 2018 | 48 | 77 | 133 | 205 | 153 | 7 | Ozone |
| 2017 | 47 | 74 | 172 | 220 | 128 | 17 | Ozone |
| 2016 | 46 | 68 | 129 | 241 | 117 | 8 | Ozone |
| 2015 | 43 | 69 | 159 | 251 | 110 | 4 | PM2.5 |
| 2014 | 45 | 61 | 141 | 251 | 101 | 13 | Ozone |
What This Means for Cache County Residents
Cache, Utah has received an Air Quality Grade of C (56/100) based on a decade of EPA monitoring data. The current median AQI of 48 falls in the "Good" range.
The primary pollutant affecting this area is Ground-Level Ozone. Over the past 5 years, this area has averaged 10 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.