POLLUTION LOCATOR|Smog and Particulates | County Report

Criteria Air Pollutant Report: ORANGE County, CA
 
 
  • Map Locating the Pollution Sources

    ORANGE 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:
    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 (1-hour):
    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

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

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  • Environmental Justice Analysis for ORANGE County

    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 35,493,192
        1-hour average 20,704,362
    PM-25
        Annual arithmetic mean 2,957,766


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  • Exposures to Criteria Air Pollutants
  • Nonattainment Status:
    This county is in the Los Angeles South Coast Air Basin, CA nonattainment area for failing to meet the national ambient air quality standard for the following criteria air pollutants:
    1. Ozone
    2. PM-10
    3. Carbon monoxide
    Air Quality Index:
    Percentage of days with good air quality:51
    Percentage of days with moderate air quality:42
    Percentage of days with unhealthful air quality for sensitive populations:6
    Percentage of days with unhealthful air quality:1
    Maximum AQI level in 2003180
    Median AQI level in 200350
    90th Percentile AQI level in 200392
    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 ppm8.4 ppm8.2 ppm 0 4
        8-hour average 9 ppm5.9 ppm4.4 ppm 0 4
    Nitrogen dioxide
        Annual arithmetic mean 0.053 ppm.02 ppm.02 ppm 0 3
    Ozone
        1-hour average 0.12 ppm.16 ppm.15 ppm 7 4
        8-hour average 0.08 ppm.1 ppm.1 ppm 12 4
    PM-25
        24-hour average 65 ug/m3116 ug/m370 ug/m3 0 2
        Annual arithmetic mean 15 ug/m317.3 ug/m313.1 ug/m3 1 2
    PM-10
        24-hour average 150 ug/m396 ug/m377 ug/m3 0 2
        Annual arithmetic mean 50 ug/m333 ug/m327 ug/m3 0 2
    Sulfur dioxide
        3-hour average 0.50 ppm.01 ppm.01 ppm 0 1
        24-hour average 0.14 ppm.01 ppm.01 ppm 0 1
        Annual arithmetic mean 0.03 ppm.002 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 Sources629,63592,3426,46313,7624,58456,399
    Area Sources21,4724,9976,07817,41652120,204
    Point Sources2,0501,704153199425,302
    All sources653,15799,04312,69431,3775,14881,906
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    Contribute to Environmental Defense
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  • Links

    Scorecard's report on
    Orange County Real-Time Air Monitoring
    California State Implementation Plan for Ozone
    California Air Resources Board
    California Air Quality Measurements (daily and hourly statistics)
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