Ravalli, Montana Air Quality
Ravalli County, Montana (MT)
↓ Improvingover 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). This area has seen measurable air quality improvement over the 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 | 22 | 58 | 110 | 293 | 69 | 1 | PM2.5 |
| 2022 | 27 | 64 | 263 | 287 | 64 | 12 | PM2.5 |
| 2021 | 28 | 76 | 159 | 268 | 67 | 23 | PM2.5 |
| 2020 | 15 | 59 | 185 | 301 | 52 | 8 | PM2.5 |
| 2019 | 19 | 55 | 77 | 303 | 61 | 0 | PM2.5 |
| 2018 | 24 | 62 | 90 | 280 | 71 | 0 | PM2.5 |
| 2017 | 42 | 107 | 198 | 209 | 111 | 40 | PM2.5 |
| 2016 | 34 | 67 | 160 | 245 | 95 | 11 | PM2.5 |
| 2015 | 28 | 71 | 272 | 268 | 62 | 21 | PM2.5 |
| 2014 | 31 | 64 | 117 | 260 | 92 | 2 | PM2.5 |
What This Means for Ravalli County Residents
Ravalli, Montana has received an Air Quality Grade of B (78/100) based on a decade of EPA monitoring data. The current median AQI of 22 falls in the "Good" range.
Encouragingly, air quality here has been improving, with the median AQI dropping by 9 points over the monitoring period. This trend suggests continued investment in emission controls and cleaner energy.
The primary pollutant affecting this area is Fine Particulate Matter (PM2.5). Over the past 5 years, this area has averaged 9 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.