POLLUTION LOCATOR|Smog and Particulates | County Report

Criteria Air Pollutant Report: DISTRICT OF COLUMBIA
 
 
  • Map Locating the Pollution Sources

    DISTRICT OF COLUMBIA
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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:
    Ozone 1-hour average concentration:
    Ozone 8-hour average concentration:
    PM-2.5 24-hour average concentration:
    PM-10 24-hour average concentration:
    Person-days in exceedance of national air quality standard for ozone (8-hour):
    See how this county ranks on other criteria air pollution attributes tracked by Scorecard

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  • Environmental Justice Analysis for DISTRICT OF COLUMBIA

    View Summary Environmental Justice Report (en español).

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  • Health Risks
  • Population Exposed to Unhealthy Levels of Criteria Air Pollutants:

    Pollutant Person-days
    in exceedance
    of NAAQS
    Ozone
        8-hour average 4,507,072


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  • Exposures to Criteria Air Pollutants
  • Nonattainment Status:
    This county is in the Washington, DC-MD-VA nonattainment area for failing to meet the national ambient air quality standard for the following criteria air pollutants:
    1. Ozone
    Air Quality Index:
    Percentage of days with good air quality:59
    Percentage of days with moderate air quality:39
    Percentage of days with unhealthful air quality for sensitive populations:2
    Percentage of days with unhealthful air quality:1
    Maximum AQI level in 2003169
    Median AQI level in 200346
    90th Percentile AQI level in 200373
    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 ppm10.9 ppm8.6 ppm 0 2
        8-hour average 9 ppm4.5 ppm4 ppm 0 2
    Nitrogen dioxide
        Annual arithmetic mean 0.053 ppm.02 ppm.02 ppm 0 3
    Ozone
        1-hour average 0.12 ppm.11 ppm.11 ppm 0 3
        8-hour average 0.08 ppm.11 ppm.11 ppm 8 3
    PM-25
        24-hour average 65 ug/m364 ug/m363 ug/m3 0 5
        Annual arithmetic mean 15 ug/m314.9 ug/m314.8 ug/m3 0 5
    PM-10
        24-hour average 150 ug/m356 ug/m350 ug/m3 0 1
        Annual arithmetic mean 50 ug/m324 ug/m30 ug/m3 0 1
    Sulfur dioxide
        3-hour average 0.50 ppm.04 ppm.04 ppm 0 1
        24-hour average 0.14 ppm.04 ppm.03 ppm 0 1
        Annual arithmetic mean 0.03 ppm.008 ppm0 ppm 0 1
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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 Sources73,42814,5991,1212,9491,1098,090
    Area Sources5,0031,9541,4324,2915,6179,676
    Point Sources1731,1651343242,37124
    All sources78,60517,7192,6877,5649,09717,791
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  • Links

    Scorecard's report on
    Washington, D.C. Real-Time Air Monitoring
    Washington, D. C. Implementation Plan
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