Is the Air Quality Good in Carbon, Wyoming?
Yes — air quality in Carbon, Wyoming is good. The city earns an Air Quality Grade of A (excellent) on a 5-year median AQI of 16, which sits in the Good range, and logs only 1 unhealthy-air days over five years (about 0 per year). The general population can breathe outdoors safely on the vast majority of days.
Who Can Safely Breathe the Air in Carbon, Wyoming?
For most healthy adults, current air quality in this area does not require any change in behavior. People with severe asthma, COPD, or recent cardiac events should still keep an eye on daily AQI alerts, especially during wildfire season. Because ozone peaks in the afternoon on hot sunny days, plan outdoor exercise for early morning or after sunset on bad-air days.
Across the past five years, this area has logged just 1 days where AQI rose into the "Unhealthy for Sensitive Groups" range or worse — about 0 days per year, or roughly one every other month. That is a low count by national standards.
Carbon, Wyoming Air Quality Snapshot
| Air Quality Grade | A92/100 |
| 5-Year Median AQI | 16 (Good) |
| Most Recent Median AQI (2023) | 8 (Good) |
| Dominant Pollutant | Ground-Level Ozone |
| 10-Year Trend | Improving (-4.85 AQI/yr) |
| Unhealthy Days (last 5 yr) | 1 |
| National Rank (cleanest = #1) | #36 of 1,020 (4th cleanest percentile) |
| Wyoming Rank | #1 of 18 |
What Does the A Grade Mean?
Carbon, Wyoming earns an A — it is among the cleanest U.S. cities tracked by EPA monitoring, with median AQI averaging just 16 over the past five years. Days in the "Good" category dominate the calendar; air-quality alerts are rare.
Carbon, Wyoming's 5-year median AQI of 16 is 25 points below the national average of 41 — meaningfully cleaner than the typical U.S. metro tracked here. Within Wyoming, Carbon, Wyoming runs cleaner than the state average of 37 — a positive signal that local conditions (terrain, wind patterns, emission sources) are working in residents' favor.
For context within Wyoming: Uinta, Wyoming currently holds the state's cleanest grade (A, AQI 21), while Johnson, Wyoming sits at the bottom (C, AQI 40).
What's in Carbon, Wyoming's Air?
The dominant pollutant in Carbon, Wyoming is Ground-Level Ozone. Ground-level ozone forms when sunlight reacts with vehicle exhaust and industrial emissions. It is worst on hot, sunny, stagnant summer days. Ozone irritates the lungs, triggers asthma attacks, and reduces lung function — even healthy adults can feel chest tightness and shortness of breath after exercising in elevated ozone.
Days by Dominant Pollutant (2023)
| Pollutant | Days as Dominant | Share of Year |
|---|---|---|
| Nitrogen Dioxide | 362 | 100% |
Is the Air Getting Better or Worse?
Air quality in Carbon, Wyoming has been improving over the past decade, with median AQI dropping by roughly 4.8 points per year. That is consistent with the broader national pattern — most U.S. metros have seen steady reductions in particulate and ozone pollution since the 2010s as cleaner vehicles and power plants come online.
In 2014, Carbon, Wyoming posted a median AQI of 42. By 2023 that figure was 8 — a drop of 34 AQI points cleaner across 10 years of EPA records.
Year-by-Year AQI in Carbon, Wyoming
| Year | Median AQI | Good Days | Unhealthy Days | Dominant Pollutant |
|---|---|---|---|---|
| 2014 | 42 | 327 | 0 | Ozone |
| 2015 | 42 | 326 | 1 | Ozone |
| 2016 | 42 | 335 | 0 | Ozone |
| 2017 | 43 | 311 | 0 | Ozone |
| 2018 | 42 | 292 | 0 | Ozone |
| 2019 | 43 | 325 | 1 | Ozone |
| 2020 | 8 | 304 | 0 | NO2 |
| 2021 | 10 | 348 | 0 | NO2 |
| 2022 | 9 | 361 | 0 | NO2 |
| 2023 | 8 | 362 | 0 | NO2 |
How This Grade Is Calculated
The AirHistory Air Quality Grade combines four signals: the 5-year median AQI (40% of the score), the 10-year trend direction (30%), the count of unhealthy days per year (20%), and the dominant pollutant type (10%). All four come directly from the EPA Air Quality System (AQS), which aggregates readings from federally certified monitors. Read the full methodology.
More about Carbon, Wyoming
Carbon, Wyoming has an Air Quality Grade of A (excellent) with a 5-year median AQI of 16. The dominant pollutant is Ground-Level Ozone, and air quality has been improving over the past decade.
This answer pulls from the EPA Air Quality System (AQS), the authoritative federal source for U.S. air quality and pollution monitoring. The headline number above is the direct answer; what follows is the additional context most readers need to use the answer for a real decision rather than just a fact lookup.
For readers turning this answer into action: cross-reference against the underlying the EPA Air Quality System (AQS) record before acting on time-sensitive decisions. The site renders the data as it was published; subsequent revisions can shift the picture, and the live federal data is always the authoritative current reference.
Source: EPA Outdoor Air Quality Data, 2026.