Ozone Exceedances (8 hr. standard) 1999-Present
Station 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 
Central
(monitor 1127)		 Aug 3
(.090)

Aug 17
(.093)

Aug 18
(.088)

Aug 23
(.086)

Aug 29
(.087)

Aug 30
(.090) 		Sept 2
(.091)

Sept 3
(.094)

Sept 19
(.085) 		Aug 4
(.086)

Aug 7
(.085) 		Aug 8
(.087)

Aug 9
(.094)

July 21
(.094)

Aug 24
(.085) 		None Sept 1
(.091) 		Jul 18
(.086)

Jul 20
(.106)		   Sept 28
(.077)		 Jun 24
(.094)

Jun 26
(.078)

Jul 2
(.078)		  

Apr 13 (.079)

Apr 12 (.079)

Apr 17 (.078)
North
(monitor 137)		 July 13
(.086)

Aug 6
(.086)

Aug 16
(.087)

Aug 17
(.093)

Aug 21
(.087)

Aug 23
(.098)

Aug 28
(.087)

Aug 29
(.085)

Aug 30
(.093)

Aug 31
(.091) 		July 14
(.097)

Aug 2

Aug 15

Aug 23

Sept 1

Sept 2
(.106)

Sept 3
(.097)

Sept 13
(.096)

Sept 19		 July 27
(.086)

Aug 7
(.086) 		Aug 8
(.086)

Aug 9
(.099) 		April 12
(.089)

July 21
(.094)

Aug 25
(.085) 		None Jun 22
(.087)

Aug 8
(.090)

Sep 2
(.087)

June 30
(.087)

July 18
(.094)

Jul 20
(.095)

  July 23
(.085)

July 28
(.079)

July 31
(.078)

Aug 4
(.087)

Aug 5
(.100)

Apr 22
(.077)

Jun 24
(.077)

Jul 26 (.078)

Aug 27 (.077)

Apr 13 (.076)
South
(monitor 174)		 Aug 10
(.103)

Aug 18
(.088)

Aug 25
(.098) 		July 19
(.097)

Sept 3
(.123)

Sept 19
(.088) 		Aug 4
(.085) 		July 23
(.088)

July 24
(.088)

Sept 10
(.095) 		April 12
(.085)

June 19
(.091)

July 29
(.088)

Aug 22
(.087)

Aug 23
(.086) 		None July 29
(.085)		 Aug 4
(.093)

Aug 19
(0.107)

Sep. 30
(0.087)		 Aug 13
(0.092)		    Jul 1
(.075)		    
West
(monitor 144)		 N.A. N.A. N.A. N.A. Aug 22
(.090) 		None July 29
(.096)

Sept 1
(.086 		Jun 8
(.086)

Aug 19
(.085)

Aug 23
(.085)

Sept 15
(.085)

    Jun 24
(.083)

Aug 12
(.081)

  

Apr 17 (.077)

Apr 13 (.076)
East
(monitor 178)		 N.A. N.A. Aug 4
(.088)		 Sept 10
(.086) 		April 12
(.089)

May 30
(.089)

Aug 22
(.089) 		None Jun 21
(.092) 		Jul 20
(.112)

Aug 4
(.091)

Aug 19
(0.099) 		Aug 13
(0.094)

Aug 14
(0.095)

 Jul 3
(.080)

Jun 26
(.083 )

Jul 15
(.083)

  

Apr 13 (.077)
Keystone N.A. N.A. July 25
(.085)

July 26
(.110)

Aug 4
(.103)

Aug 5
(.085)

Sept 13
(.097) 		Aug 6
(.088)

Aug 8
(.092)

Sept 10
(.091) 		N.A. None  N.A.  N.A.  N.A. N.A. N.A. N.A.  N.A.


Ozone Alerts Exceedances of the 8hr standard Exceedances of the 1hr standard Highest 8hr Avg. 4th Highest 8hr Avg.
1991-Present 1999-Present 1991-Present 1999-Present 1994-Present
DEQ Ozone Monitoring Data
Current Ozone Readings This Month's 8hr Avg Readings Last Month's 8hr Avg Readings This Month's 1hr. Avg Readings  Last Month's 1hr Avg Readings