POLLUTION LOCATOR|Smog and Particulates | County Report

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

    YELLOWSTONE 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:
    See how this county ranks on other criteria air pollution attributes tracked by Scorecard

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    Rank facilities in YELLOWSTONE County by criteria air pollutant emissions.
    Rank monitoring stations in YELLOWSTONE County by criteria air pollutant exposures.

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  • Environmental Justice Analysis for YELLOWSTONE County

    View Summary Environmental Justice Report (en español).

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  • Exposures to Criteria Air Pollutants
  • Nonattainment Status:
    This county is in the Laurel Area (Yellowstone County), MT nonattainment area for failing to meet the national ambient air quality standard for the following criteria air pollutants:
    1. Sulfur dioxide
    Air Quality Index:
    Percentage of days with good air quality:98
    Percentage of days with moderate air quality:2
    Percentage of days with unhealthful air quality for sensitive populations:0
    Percentage of days with unhealthful air quality:0
    Maximum AQI level in 200390
    Median AQI level in 200317
    90th Percentile AQI level in 200340
    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 ppm7.8 ppm7.5 ppm 0 2
        8-hour average 9 ppm5.7 ppm4.4 ppm 0 2
    PM-25
        24-hour average 65 ug/m335 ug/m322 ug/m3 0 1
        Annual arithmetic mean 15 ug/m38 ug/m30 ug/m3 0 1
    PM-10
        24-hour average 150 ug/m354 ug/m345 ug/m3 0 1
        Annual arithmetic mean 50 ug/m317 ug/m30 ug/m3 0 1
    Sulfur dioxide
        3-hour average 0.50 ppm.09 ppm.09 ppm 0 10
        24-hour average 0.14 ppm.03 ppm.03 ppm 0 10
        Annual arithmetic mean 0.03 ppm.006 ppm.005 ppm 0 10
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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 Sources38,6069,4431,8399,8345973,738
    Area Sources3,3691,9041,6657,3671857,311
    Point Sources1,1294,44352872115,6241,333
    All sources43,10415,7904,03217,92316,40712,382
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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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