POLLUTION LOCATOR|Smog and Particulates | County Report

Criteria Air Pollutant Report: MARICOPA County, AZ
  • Map Locating the Pollution Sources

    MARICOPA 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):
    Person-days in exceedance of national air quality standard for PM-10 (24-hour):
    See how this county ranks on other criteria air pollution attributes tracked by Scorecard

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

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  • Environmental Justice Analysis for MARICOPA 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
        8-hour average 108,456,320
        24-hour average 57,617,420
        Annual arithmetic mean 3,389,260

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  • Exposures to Criteria Air Pollutants
  • Nonattainment Status:
    This county is in the Phoenix, AZ nonattainment area for failing to meet the national ambient air quality standard for the following criteria air pollutants:
    1. Carbon monoxide
    2. PM-10
    3. Ozone
    Air Quality Index:
    Percentage of days with good air quality:46
    Percentage of days with moderate air quality:50
    Percentage of days with unhealthful air quality for sensitive populations:4
    Percentage of days with unhealthful air quality:0
    Maximum AQI level in 2003147
    Median AQI level in 200353
    90th Percentile AQI level in 200386
    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
    of NAAQS
    Carbon monoxide
        1-hour average 35 ppm7.5 ppm7.3 ppm 0 15
        8-hour average 9 ppm6.2 ppm5.5 ppm 0 15
    Nitrogen dioxide
        Annual arithmetic mean 0.053 ppm.03 ppm.02 ppm 0 8
        1-hour average 0.12 ppm.12 ppm.11 ppm 0 20
        8-hour average 0.08 ppm.1 ppm.09 ppm 32 20
        24-hour average 65 ug/m348 ug/m332 ug/m3 0 3
        Annual arithmetic mean 15 ug/m311.3 ug/m310.7 ug/m3 0 3
        24-hour average 150 ug/m3240 ug/m3225 ug/m3 17 20
        Annual arithmetic mean 50 ug/m362 ug/m362 ug/m3 1 20
    Sulfur dioxide
        3-hour average 0.50 ppm.01 ppm.01 ppm 0 2
        24-hour average 0.14 ppm.007 ppm.007 ppm 0 2
        Annual arithmetic mean 0.03 ppm.003 ppm.002 ppm 0 2
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  • 1999 Emissions Summary of Criteria Air Pollutants
  • (Expressed in tons of pollutant emitted)
    PM-2.5 PM-10 Sulfur
    Mobile Sources625,281112,47910,93931,06710,99465,290
    Area Sources90,60938,32320,99172,0562,34258,874
    Point Sources2,0688,9388581,4041756,150
    All sources717,958159,74032,788104,52713,511130,314
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  • Links

    Scorecard's report on
    Arizona State Implementation Plan
    Arizona Department of Environmental Quality
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