Klickitat, Washington Air Quality
Klickitat County, Washington (WA)
→ 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 | 20 | 47 | 128 | 109 | 8 | 1 | PM2.5 |
| 2022 | 18 | 52 | 96 | 103 | 14 | 0 | PM2.5 |
| 2021 | 21 | 53 | 76 | 103 | 16 | 0 | PM2.5 |
| 2020 | 22 | 51 | 1358 | 284 | 25 | 9 | PM2.5 |
| 2019 | 27 | 54 | 97 | 300 | 65 | 0 | PM2.5 |
| 2018 | 26 | 63 | 159 | 199 | 53 | 5 | PM2.5 |
| 2017 | 21 | 53 | 152 | 105 | 11 | 3 | PM2.5 |
| 2016 | 19 | 42 | 63 | 113 | 9 | 0 | PM2.5 |
| 2015 | 21 | 52 | 108 | 107 | 12 | 1 | PM2.5 |
| 2014 | 21 | 41 | 76 | 113 | 5 | 0 | PM2.5 |
What This Means for Klickitat County Residents
Klickitat, Washington has received an Air Quality Grade of B (73/100) based on a decade of EPA monitoring data. The current median AQI of 20 falls in the "Good" range.
The primary pollutant affecting this area is Fine Particulate Matter (PM2.5). Over the past 5 years, this area has averaged 2 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.