What Is the Air Quality in Rosebud, Montana?

Rosebud, Montana earns an A — it is among the cleanest U.S. cities tracked by EPA monitoring, with median AQI averaging just 23 over the past five years. Days in the "Good" category dominate the calendar; air-quality alerts are rare.

Rosebud, Montana's 5-year median AQI of 23 is 18 points below the national average of 41 — meaningfully cleaner than the typical U.S. metro tracked here. Within Montana, Rosebud, Montana runs cleaner than the state average of 31 — a positive signal that local conditions (terrain, wind patterns, emission sources) are working in residents' favor.

For context within Montana: Ravalli, Montana currently holds the state's cleanest grade (B, AQI 22), while Sanders, Montana sits at the bottom (D, AQI 36).

Air quality in Rosebud, Montana has been improving over the past decade, with median AQI dropping by roughly 3.6 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, Rosebud, Montana posted a median AQI of 39. By 2023 that figure was 3 — a drop of 36 AQI points cleaner across 10 years of EPA records.

Across the past five years, this area has logged just 21 days where AQI rose into the "Unhealthy for Sensitive Groups" range or worse — about 4 days per year, or roughly one every other month. That is a low count by national standards.

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.