POLLUTION LOCATOR|Smog and Particulates | County Report

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

    SANTA CLARA 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 (8-hour):
    See how this county ranks on other criteria air pollution attributes tracked by Scorecard

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    Rank facilities in SANTA CLARA County by criteria air pollutant emissions.
    Rank monitoring stations in SANTA CLARA County by criteria air pollutant exposures.

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  • Environmental Justice Analysis for SANTA CLARA 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 16,784,210


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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:75
    Percentage of days with moderate air quality:22
    Percentage of days with unhealthful air quality for sensitive populations:3
    Percentage of days with unhealthful air quality:0
    Maximum AQI level in 2003142
    Median AQI level in 200338
    90th Percentile AQI level in 200374
    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 ppm5.5 ppm5.3 ppm 0 1
        8-hour average 9 ppm4 ppm3.7 ppm 0 1
    Lead
        Quarterly average 1.5 ug/m3.01 ug/m30 ug/m3 0 1
    Nitrogen dioxide
        Annual arithmetic mean 0.053 ppm.02 ppm0 ppm 0 1
    Ozone
        1-hour average 0.12 ppm.12 ppm.11 ppm 0 6
        8-hour average 0.08 ppm.1 ppm.09 ppm 10 6
    PM-25
        24-hour average 65 ug/m356 ug/m352 ug/m3 0 2
        Annual arithmetic mean 15 ug/m311.7 ug/m310.1 ug/m3 0 2
    PM-10
        24-hour average 150 ug/m357 ug/m355 ug/m3 0 2
        Annual arithmetic mean 50 ug/m324 ug/m323 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 Sources330,87554,4227,16025,3452,20029,737
    Area Sources31,4572,5677,24922,8388711,271
    Point Sources3,4314,1292133814722,824
    All sources365,76361,11814,62148,5642,75843,832
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  • Links

    Scorecard's report on
    Santa Clara 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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