Fremont, Wyoming Air Quality
Fremont County, Wyoming (WY)
→ 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 | 49 | 65 | 110 | 215 | 147 | 3 | Ozone |
| 2022 | 46 | 61 | 100 | 254 | 111 | 0 | Ozone |
| 2021 | 46 | 77 | 141 | 240 | 117 | 8 | Ozone |
| 2020 | 45 | 60 | 161 | 282 | 78 | 6 | Ozone |
| 2019 | 45 | 60 | 122 | 291 | 73 | 1 | Ozone |
| 2018 | 46 | 67 | 97 | 250 | 115 | 0 | Ozone |
| 2017 | 47 | 66 | 118 | 249 | 114 | 2 | Ozone |
| 2016 | 44 | 61 | 84 | 298 | 68 | 0 | Ozone |
| 2015 | 45 | 60 | 97 | 276 | 89 | 0 | Ozone |
| 2014 | 45 | 57 | 105 | 294 | 70 | 1 | Ozone |
What This Means for Fremont County Residents
Fremont, Wyoming has received an Air Quality Grade of C (60/100) based on a decade of monitoring data from the EPA's air quality monitoring program. The current median AQI of 49 falls in the "Good" range.
The primary pollutant affecting this area is Ground-Level Ozone. 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. The American Lung Association's State of the Air report provides additional context on long-term health risks from air pollution exposure.
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Frequently Asked Questions
Fremont, Wyoming has a current median AQI of 49, which falls in the "Good" range. The area has received an Air Quality Grade of C (60/100) based on 10 years of EPA monitoring data.
Air quality in Fremont, Wyoming is stable over the past decade. The median AQI has changed by +4 points from 2014 to 2023.
Fremont, Wyoming averages 4 unhealthy air quality days per year over the past 5 years. On these days, sensitive groups including children, the elderly, and those with respiratory conditions should limit outdoor activity.
The primary pollutant affecting Fremont, Wyoming is Ground-Level Ozone. This is the dominant contributor to elevated AQI readings in the Fremont County area.
Fremont, Wyoming averages 4 unhealthy air days per year. This is relatively low, making it a reasonable choice for asthma sufferers. The primary pollutant is Ground-Level Ozone, which is a known asthma trigger.
With a median AQI of 49 (Good), outdoor exercise in Fremont, Wyoming is generally safe year-round. Fremont, Wyoming averages 4 days per year when athletes should move workouts indoors.