2011 SEASON OZONE SCORECARD

Tulsa Area Ozone Trends

2011 Tulsa Area Ozone Highest 8-Hr Averages*

                Last Updated: 10/3/11  9:00 AM(26  So Far) Exceedance Days:      Apr 12;  Apr 13;  Apr 17;  Jun 23; Jul 5;  Jul 6;  Jul 7; Jul 14;  Jul 15;  Jul 25;  Aug 3;  Aug 4;  Aug 6;  Aug 9;  Aug 15;  Aug 19;  Aug 20;  Aug 21;  Aug 26;  Aug 27;  Aug 28;  Aug 30;  Aug 31; Sept 1; Sept 13; Sept 28

   


Monitor Site

 

2011 Highest 8-Hr Ozone Averages (ppm)

(1st through 4th highest readings)

DESIGN VALUE

3-Year Average

of the 4th highest readings

2008 4th High

2009 4th High

2010 4th High

1st Highest

date

2nd Highest

date

3rd Highest

date

4th Highest

date

08-10 Avg

CURRENT

2009-2011

3-Yr Avg

West (#144 Mannford)

0.091

26-Aug

0.084

23-Jun

0.083

4-Aug

0.083

9-Aug

0.070

0.075

0.69

0.074

0.069

East (#178 Lynn Lane)

0.095

3-Aug

0.089

20-Aug

0.082

7-Jul

0.082

13-Sept

0.070

0.075

0.069

0.072

0.071

Central (#1127 Tulsa)

0.090

27-Aug

0.088

5-Jul

0.088

13-Sept

0.085

26-Aug

0.070

0.075

0.069

0.072

0.070

North (#137 Skiatook)

0.093

13-Sept

0.087

5-Jul

0.087

27-Aug

0.085

19-Aug

0.075

0.077

0.079

0.073

0.073

South (#174 Glenpool)

0.083

13-Sept

0.082

23-Jun

0.080

4-Aug

0.080

9-Aug

0.067

0.072

0.066

0.067

0.069

An ozone exceedance = .076 ppm or greater

Is our 2009-2011 Design Value meeting the ozone standard? NO

An ozone Exceedance occurs any day that the 8-hr average is .076 ppm or greater.  It does not necessarily mean a violation of the ozone standard has occurred.  The standard uses the ozone monitor with the highest 'Design Value'.  The Design Value is the monitor with the highest ozone data (4th highest value), averaged over a rolling 3-year average.  Thus, our current ozone Design Value is the average of 2009's 4th high value + 2010's + 2011's 4th high (with no rounding).

 

 *2011 data is preliminary and subject to change as a result of the ODEQ/EPA verification process
 

Explaining the Ozone Standard Averages

·       EPA's National Ambient Air Quality Standard (NAAQS) for Ozone is 0.075 parts per million (ppm)

·       The Ozone Standard is calculated by averaging data over a three year time period. This average is taken from the fourth highest (8-hr average) at each monitor. A violation occurs when the 3-year average is greater than 0.075 ppm.

·      The monitor with the highest 3-year average defines an area’s ‘Design Value’.

 

Tulsa Area Ozone Alert! Days  (2000 - present)

Year

May

June

July

August

September

Alert! Days

2011

 

 3rd,  15th , 24th, 28th

2nd , 6th , 8th, 9th, 15th,  29th 3rd, 4th, 5th, 17th, 20th, 21st, 24th25th, 26th, 27th, 28th 1st,  2nd, 3rd; 13th

25  (so far)

2010

28th

   

12th, 19th, 23rd , 28th

 

5

2009

 

24th, 25th, 26th, 27th, 30th

 1st, 7th, 11th, 16th

13th, 25th

 

 11

2008

None

 None

 18th, 28th, 31st

 1st, 2nd, 4th,5th,26th

None

 8

2007

None

None

None

2nd, 3rd, 14th, 15th, 16th

None

5

2006

25th

12th, 15th, 29th, 30th

1st, 2nd, 17th, 19th, 20th, 21st

24th

None

12

2005

None

21st, 22nd, 24th, 25th, 26th

30th

1st, 2nd, 4th, 10th

3rd, 4th, 5th

13

2004

None

None

15th, 21st, 22nd

None

None

3

2003

None

None

2nd, 3rd, 30th

6th, 7th, 23rd, 26th, 27th

None

8

2002

None

24th, 25th

9th, 10th, 25th

6th, 9th, 31st

None

8

2001

None

26th

11th, 25th

3rd, 4th, 6th, 7th

14th

8

2000

None

None

17th

1st, 2nd, 3rd, 4th, 15th, 16th, 23rd, 24th, 25th, 26th

2nd, 3rd, 4th, 8th

15