POLLUTION LOCATOR|Smog and Particulates | County Report

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

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

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  • Environmental Justice Analysis for RAVALLI County

    View Summary Environmental Justice Report (en español).

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  • Exposures to Criteria Air Pollutants
  • Air Quality Index:
    Percentage of days with good air quality:92
    Percentage of days with moderate air quality:7
    Percentage of days with unhealthful air quality for sensitive populations:1
    Percentage of days with unhealthful air quality:1
    Maximum AQI level in 2003155
    Median AQI level in 200316
    90th Percentile AQI level in 200337
    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
    PM-25
        24-hour average 65 ug/m372 ug/m372 ug/m3 1 1
        Annual arithmetic mean 15 ug/m39.1 ug/m30 ug/m3 0 1
    PM-10
        24-hour average 150 ug/m3231 ug/m3196 ug/m3 2 2
        Annual arithmetic mean 50 ug/m319 ug/m317 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 Sources9,1422,5371,63310,067139926
    Area Sources12,2925961,5772,964321,556
    Point Sources255415539
    All sources21,4593,1393,25113,0861742,491
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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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