POLLUTION LOCATOR|Smog and Particulates | County Report

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

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

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  • Environmental Justice Analysis for LOS ANGELES 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 2,862,736,740
        1-hour average 1,115,480,178
    PM-25
        Annual arithmetic mean 88,843,554


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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
    This county is in the Southeast Desert Modified AQMA, CA nonattainment area for failing to meet the national ambient air quality standard for the following criteria air pollutants:
    1. Ozone
    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. PM-10
    2. Carbon monoxide
    Air Quality Index:
    Percentage of days with good air quality:24
    Percentage of days with moderate air quality:45
    Percentage of days with unhealthful air quality for sensitive populations:21
    Percentage of days with unhealthful air quality:10
    Maximum AQI level in 2003212
    Median AQI level in 200372
    90th Percentile AQI level in 2003151
    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 ppm12.2 ppm10.4 ppm 0 13
        8-hour average 9 ppm7.3 ppm7.2 ppm 0 13
    Lead
        Quarterly average 1.5 ug/m3.09 ug/m3.07 ug/m3 0 9
    Nitrogen dioxide
        Annual arithmetic mean 0.053 ppm.03 ppm.03 ppm 0 14
    Ozone
        1-hour average 0.12 ppm.19 ppm.18 ppm 113 14
        8-hour average 0.08 ppm.15 ppm.14 ppm 290 14
    PM-25
        24-hour average 65 ug/m3121 ug/m3121 ug/m3 0 10
        Annual arithmetic mean 15 ug/m322.1 ug/m321.4 ug/m3 9 10
    PM-10
        24-hour average 150 ug/m3119 ug/m398 ug/m3 0 9
        Annual arithmetic mean 50 ug/m344 ug/m338 ug/m3 0 9
    Sulfur dioxide
        3-hour average 0.50 ppm.02 ppm.01 ppm 0 4
        24-hour average 0.14 ppm.008 ppm.006 ppm 0 4
        Annual arithmetic mean 0.03 ppm.003 ppm.002 ppm 0 4
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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 Sources1,617,266314,94521,41558,29019,912148,912
    Area Sources54,81417,16513,15730,1461,61157,286
    Point Sources15,19225,6282,8783,2879,58917,063
    All sources1,687,272357,73937,45091,72231,112223,261
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  • Links

    Scorecard's report on
    Los Angeles 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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