Pinal County Air Quality

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Pinal County Air Quality

• March 26, 2009
• PM10 Natural/Exceptional Event

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March 26, 2009

• Strong cold front moved through the area. Winds
  associated with the front transported dust into
  Pinal County. The Maximum winds reached 37 mph
  and eight PCAQCD monitors exceeded the 24-hr PM10
  NAAQS.
• Site 24-hr PM10 Conc. (ug/m3)
• PCH (TEOM) 337.1
• Maricopa (TEOM) 284.8
• Cowtown (TEOM) 224.6
• Stanfield (TEOM) 209.6
• Cowtown (Filter) 197
• Coolidge (Filter) 189
• PCHEast (Filter) 187
• PCHWest (Filter) 179

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9 a.m. local time
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10 a.m. local time
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11 a.m. local time
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12 p.m. local time
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1 p.m. local time
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2 p.m. local time
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3 p.m. local time
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4 p.m. local time
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5 p.m. local time
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6 p.m. local time
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7 p.m. local time
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8 p.m. local time
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9 p.m. local time
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10 p.m. local time
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11 p.m. local time
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3/26/09 But for Test

• PCH (TEOM) had the following 24-hr PM10
  concentrations before/after the 3/26/09
  natural/exceptional event
• 3/25/09 58.4 ug/m3
• 3/27/09 44.0 ug/m3
• Maricopa (TEOM)
• 3/25/09 36.6 ug/m3
• 3/27/09 40.2 ug/m3
• Cowtown (TEOM)
• 3/25/09 94.0 ug/m3
• 3/27/09 79.7 ug/m3
• Stanfield (TEOM)
• 3/25/09 54.6 ug/m3
• 3/27/09 40.7 ug/m3