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2011 Ozone Season
2011 Ozone Season Air Quality Health Alerts and Exceedances
The following table shows the number of times, indicated in orange, that the San Antonio Metropolitan Area had received a warning and/or exceeded the EPA's Ambient Air Quality Standard for ground-level ozone during the 2011 Ozone Season:

Date

Warning Level

High 8-hour reading at a Regulatory Site 

 05/16/11

 No warning  78 - San Antonio Northwest C23 

 06/06/11

  No warning  79 - San Antonio Northwest C23 
 76 - Camp Bullis C58
 08/27/11  Orange  76 - San Antonio Northwest C23
 76 - Camp Bullis C59 
 08/28/11  Orange  77 - San Antonio Northwest C23
 08/29/11  Orange  76 - Camp Bullis C59
 09/07/11  Orange  87 - San Antonio Northwest C23 
 78 - Calaveras Lake C59
 09/08/11  Orange No actual exceedance
 09/09/11  Orange No actual exceedance 
 09/10/11  Orange  84 - San Antonio Northwest C23 
 09/11/11   Orange   78 - San Antonio Northwest C23 
 09/12/11  Orange  No actual exceedance 
 10/02/11   No warning  78 - San Antonio Northwest C23
 10/03/11   No warning  79 - San Antonio Northwest C23