Adams, Washington Air Quality
Adams County, Washington (WA)
↓ 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 | 21 | 50 | 267 | 330 | 32 | 3 | PM2.5 |
| 2022 | 18 | 52 | 162 | 327 | 34 | 4 | PM2.5 |
| 2021 | 19 | 45 | 191 | 333 | 24 | 7 | PM2.5 |
| 2020 | 17 | 43 | 266 | 345 | 11 | 8 | PM2.5 |
| 2019 | 17 | 42 | 89 | 339 | 21 | 0 | PM2.5 |
| 2018 | 17 | 58 | 195 | 295 | 47 | 8 | PM2.5 |
| 2017 | 18 | 52 | 207 | 316 | 30 | 11 | PM2.5 |
| 2016 | 19 | 33 | 58 | 339 | 7 | 0 | PM2.5 |
| 2015 | 27 | 55 | 165 | 294 | 57 | 5 | PM2.5 |
| 2014 | 21 | 44 | 76 | 317 | 29 | 0 | PM2.5 |
What This Means for Adams County Residents
Adams, Washington has received an Air Quality Grade of B (76/100) based on a decade of EPA monitoring data. The current median AQI of 21 falls in the "Good" range.
Encouragingly, air quality here has been improving, with the median AQI dropping by 0 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 4 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.