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AirHistory

Roosevelt, Montana Air Quality

Roosevelt County, Montana (MT)

Stableover 10 years

B
Air Quality Grade
78/100
13
Current Median AQI
Good
14
5-Year Avg AQI
-2
10-Year Change
Better
0
Unhealthy Days/yr
5-year average
PM2.5
Primary Pollutant
Fine Particulate Matter (PM2.5)

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

YearMedian AQI90th PctMax AQIGood DaysModerateUnhealthy+Pollutant
202313521616291PM2.5
20221430649830PM2.5
202116569989110PM2.5
20201234607430PM2.5
20191329548940PM2.5
2018175213493102PM2.5
20171540768550PM2.5
201613258010040PM2.5
201514431539534PM2.5
201415367410540PM2.5

What This Means for Roosevelt County Residents

Roosevelt, Montana has received an Air Quality Grade of B (78/100) based on a decade of EPA monitoring data. The current median AQI of 13 falls in the "Good" range.

The primary pollutant affecting this area is Fine Particulate Matter (PM2.5). Over the past 5 years, this area has averaged 0 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.