POLLUTION LOCATOR|Smog and Particulates | County Report

Criteria Air Pollutant Report: MISSOULA County, MT
 
 
  • Map Locating the Pollution Sources

    MISSOULA County
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  • Air Quality Rankings: Health Risks, Exposure, and Emissions
    Cleanest/Best Counties in US Percentile Dirtiest/Worst Counties in US
    0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

    Carbon Monoxide emissions:
    Nitrogen Oxides emissions:
    PM-2.5 emissions:
    PM-10 emissions:
    Sulfur Dioxide emissions:
    Volatile Organic Compound emissions:
    Air Quality Index:
    PM-2.5 24-hour average concentration:
    PM-10 24-hour average concentration:
    Person-days in exceedance of national air quality standard for PM-2.5 (24-hour):
    Person-days in exceedance of national air quality standard for PM-10 (24-hour):
    See how this county ranks on other criteria air pollution attributes tracked by Scorecard

    Rank counties in MONTANA by criteria air pollutant health risks, exposures, or emissions.
    Rank facilities in MISSOULA County by criteria air pollutant emissions.
    Rank monitoring stations in MISSOULA County by criteria air pollutant exposures.

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  • Environmental Justice Analysis for MISSOULA County

    View Summary Environmental Justice Report (en español).

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  • Exposures to Criteria Air Pollutants
  • Nonattainment Status:
    This county is in the Missoula, MT nonattainment area for failing to meet the national ambient air quality standard for the following criteria air pollutants:
    1. Carbon monoxide
    2. PM-10
    Air Quality Index:
    Percentage of days with good air quality:89
    Percentage of days with moderate air quality:9
    Percentage of days with unhealthful air quality for sensitive populations:1
    Percentage of days with unhealthful air quality:1
    Maximum AQI level in 2003264
    Median AQI level in 200320
    90th Percentile AQI level in 200355
    Air Quality Index
    0 - 50 Good
    50 - 100 Moderate
    100 - 200 Unhealthful
    200 - 300 Very Unhealthful
    300 - 500 Hazardous
    2003 Summary of Pollutant Concentrations:
    Pollutant NAAQS
    Standard
    Highest
    Recorded
    Concentration
    Second
    Highest
    Recorded
    Concentration
    Number
    of NAAQS
    Exceedances
    Stations
    Monitoring
    Pollutant
    Carbon monoxide
        1-hour average 35 ppm4.5 ppm4.4 ppm 0 1
        8-hour average 9 ppm4 ppm3.6 ppm 0 1
    Nitrogen dioxide
        Annual arithmetic mean 0.053 ppm.01 ppm0 ppm 0 1
    PM-25
        24-hour average 65 ug/m3111 ug/m399 ug/m3 3 3
        Annual arithmetic mean 15 ug/m312.3 ug/m311.9 ug/m3 0 3
    PM-10
        24-hour average 150 ug/m3214 ug/m3186 ug/m3 3 2
        Annual arithmetic mean 50 ug/m324 ug/m322 ug/m3 0 2
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  • 1999 Emissions Summary of Criteria Air Pollutants
  • (Expressed in tons of pollutant emitted)
      Carbon
    monoxide
    Nitrogen
    oxides
    PM-2.5 PM-10 Sulfur
    dioxide
    Volatile
    organic
    compounds
    Mobile Sources28,5686,4731,6848,9824314,158
    Area Sources20,5472,2232,3504,1052313,648
    Point Sources3,9902,2585268051811,066
    All sources53,10510,9544,56013,8918438,871
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  • Links

    Scorecard's report on
    EPA's Position On Billings/Laurel SO2 State Implementation Plan
    Montana Department of Environmental Quality
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