POLLUTION LOCATOR|Smog and Particulates | County Report

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

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

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

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  • Environmental Justice Analysis for SAN FRANCISCO County

    View Summary Environmental Justice Report (en español).

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  • Exposures to Criteria Air Pollutants
  • Nonattainment Status:
    This county is in the San Francisco Bay Area, CA 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:88
    Percentage of days with moderate air quality:12
    Percentage of days with unhealthful air quality for sensitive populations:0
    Percentage of days with unhealthful air quality:0
    Maximum AQI level in 2003103
    Median AQI level in 200327
    90th Percentile AQI level in 200353
    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 ppm8.6 ppm5.1 ppm 0 2
        8-hour average 9 ppm3.6 ppm3.2 ppm 0 2
    Lead
        Quarterly average 1.5 ug/m3.01 ug/m30 ug/m3 0 1
    Nitrogen dioxide
        Annual arithmetic mean 0.053 ppm.01 ppm0 ppm 0 1
    Ozone
        1-hour average 0.12 ppm.08 ppm.08 ppm 0 1
        8-hour average 0.08 ppm.05 ppm.05 ppm 0 1
    PM-25
        24-hour average 65 ug/m342 ug/m337 ug/m3 0 1
        Annual arithmetic mean 15 ug/m310.1 ug/m30 ug/m3 0 1
    PM-10
        24-hour average 150 ug/m351 ug/m348 ug/m3 0 1
        Annual arithmetic mean 50 ug/m322 ug/m30 ug/m3 0 1
    Sulfur dioxide
        3-hour average 0.50 ppm.01 ppm.01 ppm 0 1
        24-hour average 0.14 ppm.007 ppm.006 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 Sources141,33531,4822,8267,4433,98814,606
    Area Sources1,8241,2701,7737,917734,668
    Point Sources5861,15611713857747
    All sources143,74633,9084,71615,4984,11820,020
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  • Links

    Scorecard's report on
    San Francisco City and 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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