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California Environmental Health Tracking Program

850 Marina Bay Pkwy, P-3
Richmond, CA 94804

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Last Edited: 3/26/2015

Air Quality: PM10 Measures by Air Basin

Table 1. Estimated number of days over the CA 24-Hour standard* by Air Basin

Table 2. Annual average of daily PM10 concentrations by Air Basin

Table 3. Estimated number of days over the US 24-Hour standard* by Air Basin

 

 

Table 1. Estimated number of days over the CA 24-Hour standard* by Air Basin
Air Basins 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Great Basin Valleys  58.3 41 93.4 43.7 34.6 35.7 38.2 3.2 23.6 26 18.4 34.8 20.3
Lake County 0 0 11.5 0 0 0 0 0 18.2 0 0 0 0
Lake Tahoe  0 0 0 6.1 * 0 3 * * * * * *
Mojave Desert 36.7 18.1 55.3 18.4 0 19.1 25.6 36.6 13 12.2 0 11.8 19.1
Mountain Counties  24.9 36.6 18 5.7 0 6 0 0 6.1 18.5 12 * 0
North Central Coast  24.3 * 24.7 40.7 42.5 11.8 18.2 6 30.5 0 11.5 * *
North Coast  6.5 23.5 12.1 24.9 0 0 11.8 3.9 23.6 6.1 6 6.1 0
Northeast Plateau  * * 5.7 0 0 0 0 0 24.9 * 0 0 0
Sacramento Valley  42.8 49.9 41 30.6 79.5 42.3 53.3 36.4 68.7 18.4 12.2 24.4 18.7
Salton Sea  313.2 311.9 305.3 284.2 219.5 160.1 240.6 219.1 186.8 207.4 55 93.4 210
San Diego  108.6 129.3 172.9 150.7 174.5 52.7 159.4 158.6 163.4 146.4 136 138.5 6.1
San Francisco Bay Area 42.4 47.6 24.4 18.2 24.5 23.2 77.3 24.2 18.3 6.5 6.1 6.1 6.1
San Joaquin Valley 195.5 167.9 255.8 167.2 113 146.2 166.8 145.1 182.2 123.4 67.4 116.4 89.4
South Central Coast  39.4 18.4 18.6 31.1 54.5 12.1 30.4 51.2 109.9 53.8 45.6 69.6 71.3
South Coast  247.5 240.1 228.1 201.4 210.1 198.2 241.1 272.9 205.7 204.6 137.1 145.9 98.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*Number of  days for daily PM10 average concentrations over the CA standard (50 μg/m3)

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Table 2. Annual average of daily PM10 concentrations  by Air Basin
Air Basins 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Great Basin Valleys  116.7 63.1 159.3 130.4 68.2 30.1 63 14.5 21.9 22.6 16.5 25.6 19.7
Lake County 10.6 10.2 13.1 10 9.9 9.6 11.6 8.8 13.3 9.3 8.4 8.5 8.8
Lake Tahoe  17.2 16.9 17 17.9 * 14.7 17.1 * * * * * *
Mojave Desert 33.6 29.7 34 27.8 18.3 26.1 30.4 35.9 22.3 25 18.7 22.3 27.5
Mountain Counties  19.9 29.5 25.8 21 17.2 17.9 17.5 16.2 15.7 23.6 20.3 * 13.7
North Central Coast  31.1 * 28.9 31.5 28.2 24.2 24.9 25.4 27.4 22.1 20.6 * *
North Coast  23.5 25.4 22.8 22.1 20.6 18.5 21.8 20.6 21.5 18.8 19 20.3 16.8
Northeast Plateau  * * 17.5 12.7 12.8 13.3 13.3 4.6 18.8 * 9.9 10.9 12.4
Sacramento Valley  27.8 30.5 31.8 28.8 35.1 27.9 28.7 28.1 33.4 26.4 21 25.1 24.3
Salton Sea  84.8 87 80.9 79.7 60.3 52.6 71.6 65.5 53.9 65.4 37.7 40.9 63.7
San Diego  44.4 47.3 52.4 52.5 51.6 32.1 54 58.4 56.1 53.9 47 46.2 24.3
San Francisco Bay Area 27.7 29.6 26.3 24.7 25.9 24.1 35 25.6 24.1 20.3 19.5 20.2 18.8
San Joaquin Valley 53.9 52.3 59.9 52.2 43.6 44.5 56.4 48.5 55.9 46.5 35 44.2 41.4
South Central Coast  31.2 28.8 28.5 29.9 29.7 27.8 29.5 33.9 35.8 28.2 25.3 35.9 35.1
South Coast  60 62.9 56.1 55.1 53.4 50.3 62.2 66.5 55 51.6 41.2 40.3 38.8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 *Annual Average of PM10 concentrations (μg/m3)

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Table 3. Estimated number of days over the US 24-Hour standard* by Air Basin
Air Basins 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Great Basin Valleys  43 38.6 48.5 42.9 45.1 38 45.7 26.3 25.7 30.9 37.5 40.4 33.8
Lake County 0 * * * * * * * * * * * *
Lake Tahoe  0 0 0 0 * 0 * * * * * * *
Mojave Desert * 1.1 3.2 2 2 0 2.2 7 * 1 * 0 *
Mountain Counties  0 6.1 0 0 * 0 0.9 0 * 0 0 0 0
North Central Coast  0 0 0 0 0 0 0 0 0 0 0 0 0
North Coast  0 0 0 * 0 * * 0 26.7 * 0 0 0
Northeast Plateau  0 0 0 0 0 0 0 6.1 3.1 0 0 0 0
Sacramento Valley  0 * * 0 6.1 0 1.1 0 6.6 0 0 0 0
Salton Sea  30.6 6.1 18.3 12.3 * * 16.3 13 3 18.3 0 2 9.9
San Diego County 0 0 0 6.1 0 * 0 6.1 6.1 0 0 0 *
San Francisco Bay Area 0 0 0 0 0 0 0 0 0 0 0 0 0
San Joaquin Valley 0 4 2.9 0 0.9 0 4.2 1.4 4.8 1.9 1 0 0
South Central Coast  0 0 1 1 0 0 0 6.1 0 0 1 0 2.8
South Coast  0 6.1 0 6.2 0 0 * * 0 0 * 0 0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*Number of  days for daily PM10 average concentrations over the US standard (150 μg/m3)

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Notes About the Data

  • PM10 (particulate matter with a diameter of less than 10 microns) is a Criteria Air Pollutant that comes from motor vehicles, wildfires, and industrial sources. For more information…
  • Exposure to PM10  has been linked to asthma attacks, bronchitis, and other lung diseases. For more information…
  • Data Sources:Air Quality Data are from the United States Environmental Protection Agency (EPA),  the 2010 U.S. Census, and the California Air Resources Board.  For more information…
  • Air basins are multi-county regions of the state that have similar meteorological and geographical conditions.
  • If the air basin has a value of " * ",  there was insufficent (or no) data available to determine the value.