Bad Air Days in Washakie County, Wyoming: 0 a Year
0 bad air days a year
Rare: among the cleanest-air counties EPA monitors. Ranked 995 of 996 monitored counties, where 1 is worst.
What actually helps here
- Bad air days are rare here. A standard furnace filter is enough; no purifier needed for outdoor air.
- On the odd bad day, check AirNow and keep windows shut.
The record for Washakie
| Date | AQI | Main pollutant |
|---|---|---|
| 2024-09-29 | 83 | PM2.5 |
| 2024-07-22 | 71 | PM2.5 |
| 2024-07-23 | 70 | PM2.5 |
| 2025-08-15 | 68 | PM2.5 |
| 2024-10-05 | 64 | PM2.5 |
An ordinary day in Washakie
Across 684 monitored days from 2024 to 2025, the air in Washakie County rated Good on 95% of them, more often than the 72% typical of monitored counties, and Moderate on 5%. The median day sat at AQI 8; one day in ten went above 34.
The pollutant setting the AQI on an ordinary day here:
- fine particles (PM2.5)100%684 days
Every recent year on file
| Year | Days monitored | Good | Moderate | Over 100 | Over 150 | Median AQI | Highest AQI |
|---|---|---|---|---|---|---|---|
| 2025* | 355 | 342 | 13 | 0 | 0 | 8 | 68 |
| 2024 | 329 | 309 | 20 | 0 | 0 | 8 | 83 |
*2025 may be a partial year in EPA's file.
Wyoming compared
- Platte County9/yr
- Sweetwater County7/yr
- Albany County6/yr
- Campbell County5/yr
- Sublette County5/yr
- Sheridan County3/yr
- Laramie County3/yr
- Teton County3/yr
How this is counted
A bad air day is a day the county's daily AQI from EPA AirData went above 100, the level where EPA tells children, older adults and people with asthma or heart disease to cut back outdoors. Monitors do not run every day, so yearly counts are scaled to 365 days. This is the record, not today's air: for that, check AirNow. More on the method in how the county numbers are made, on the AQI 100 line in what counts as a bad air day.