Wyoming Air Quality
Medicine Bow National Forest is the worst air in Wyoming right now at an index of 44, which is Good, from ground-level ozone. AirNow carries 19 reporting areas in the state. No air quality alert is in force.
- Reporting areas
- 19
- Worst index now
- 44
- Alerts in force
- 0
- Towns under smoke
- Unavailable
Fine particles on the map
Forecast fine particulate matter from NOAA’s National Air Quality Forecast Capability over Wyoming. Open it for the live map, where it pans and zooms.
Open the live map with the particulate forecast
Map layer from NOAA National Air Quality Forecast Capability. Boundaries from the Iowa Environmental Mesonet.
Alerts in force
An Air Quality Alert is issued by the National Weather Service on behalf of a state or local agency when pollution is expected to reach a level that harms health. An Air Stagnation Advisory means the air will not move enough to clear what is already in it.
None are in force in Wyoming right now. All Wyoming warnings.
By city, now and the days ahead19
Every AirNow reporting area in Wyoming: what its monitors measured this hour, and what the state or local agency that forecasts for it expects today and tomorrow. Each area links to the nearest town’s page.
| Reporting area | Now | Category now | Today | Tomorrow | Pollutant |
|---|---|---|---|---|---|
| Medicine Bow National Forest | 44 | Good | Not forecast | Not forecast | Ozone |
| Lander | 37 | Good | Not forecast | Not forecast | Ozone |
| Johnson County | 34 | Good | Not forecast | Not forecast | Ozone |
| Pinedale | 28 | Good | Not forecast | Not forecast | Ozone |
| Sheridan | 24 | Good | Not forecast | Not forecast | PM2.5 |
| Daniel South | 23 | Good | Not forecast | Not forecast | Ozone |
| Douglas | 23 | Good | Not forecast | Not forecast | Ozone |
| Juel Spring | 23 | Good | Not forecast | Not forecast | Ozone |
| Cheyenne | 21 | Good | Not forecast | Not forecast | Ozone |
| Cody | 21 | Good | Not forecast | Not forecast | PM2.5 |
| Moxa Arch | 19 | Good | Not forecast | Not forecast | Ozone |
| Gillette | 18 | Good | Not forecast | Not forecast | Ozone |
| Boulder | 17 | Good | Not forecast | Not forecast | Ozone |
| Big Piney | 15 | Good | Not forecast | Not forecast | Ozone |
| Wamsutter | 11 | Good | Not forecast | Not forecast | Ozone |
| Jackson | 8 | Good | Not forecast | Not forecast | Ozone |
| Riverton | 8 | Good | Not forecast | Not forecast | PM10 |
| Rock Springs | 4 | Good | Not forecast | Not forecast | PM2.5 |
| Laramie | 0 | Good | Not forecast | Not forecast | PM2.5 |
Smoke
NOAA’s Hazard Mapping System smoke analysis could not be read just now.
What this means
The index runs from 0 to 500. Good is 0 to 50, Moderate to 100, Unhealthy for Sensitive Groups to 150, Unhealthy to 200, Very Unhealthy to 300, and Hazardous above that. The figure reported for a place is the highest index among the pollutants measured there, and the pollutant that produced it is named beside it.
What these numbers are. An index beside a monitor’s name is a measurement, published hourly by AirNow and preliminary until the operating agency certifies it. A category for today or tomorrow is a state or local agency forecaster’s own forecast for a reporting area. An hourly index is NOAA’s air quality model on a five-kilometer grid, not a reading from any instrument. Where a town has no monitor within reach, only the model figures appear, and the page says so.
Towns
Air quality for any town in Wyoming: what is measured nearby, the category forecast for today and tomorrow, and NOAA’s model hour by hour. Largest first.
- Cheyenne65,132 people
- Casper60,285 people
- Gillette32,649 people
- Laramie32,158 people
- Rock Springs23,962 people
- Sheridan17,873 people
- Green River12,465 people
- Evanston12,133 people
- Riverton10,873 people
- Jackson10,523 people
- Cody9,792 people
- Rawlins9,040 people
- Lander7,686 people
- Torrington6,669 people
- Douglas6,531 people
- Powell6,462 people
- Ranchettes5,798 people
- Worland5,372 people
- Buffalo4,632 people
- South Greeley4,217 people
- Mills3,785 people
- Wheatland3,659 people
- Fox Farm-College3,647 people
- Newcastle3,534 people
- Thermopolis2,974 people
- Evansville2,931 people
- Bar Nunn2,820 people
- Kemmerer2,739 people
- Glenrock2,598 people
- Lovell2,422 people
- North Rock Springs2,207 people
- Lyman2,074 people
- Afton1,972 people
- Pinedale1,923 people
- Greybull1,879 people
- Wright1,862 people
- Moose Wilson Road1,821 people
- Fort Washakie1,759 people
- South Park1,731 people
- Saratoga1,677 people
- Antelope Valley-Crestview1,658 people
- Arapahoe1,656 people
- Lusk1,628 people
- Ethete1,553 people
- Star Valley Ranch1,548 people
- Wilson1,482 people
- Sleepy Hollow1,308 people
- Basin1,305 people
- Mountain View1,294 people
- Sundance1,272 people
- Guernsey1,195 people
- Hoback1,176 people
- Pine Bluffs1,146 people
- Upton1,109 people
- Marbleton1,090 people
- Rafter J Ranch1,075 people
- Moorcroft1,062 people
Smaller places have pages too; search for one on the air quality landing page.
Sources
Observations and daily forecasts from AirNow, the US Environmental Protection Agency’s program with NOAA, the National Park Service, NASA, tribal, state and local agencies. Hourly forecasts from NOAA’s National Air Quality Forecast Capability. Smoke analysis from NOAA’s Hazard Mapping System. Alerts from the National Weather Service. Index categories and breakpoints are EPA’s, as revised in 2024.