2011 Ozone Scorecard

Monitor Site

2011 Highest 8-Hr Ozone Averages (ppm)*

(1^st through 4^th highest readings)

DESIGN VALUE

3-Year Average

of the 4^th highest readings

2008 4^th High

2009 4^th High

2010 4^th High

1^st Highest

date

2^nd Highest

date

3^rd Highest

date

4^th Highest

date

08-10 Avg

CURRENT

2009-2011

West (#144 Mannford)

0.091

26-Aug

0.070

0.075

0.69

0.074

0.069

East (#178 Lynn Lane)

0.095

3-Aug

0.070

0.075

0.069

0.072

0.071

0.090

27-Aug

0.070

0.075

0.069

0.072

0.070

North (#137 Skiatook)

0.093

13-Sept

0.075

0.077

0.079

0.073

0.073

South (#174 Glenpool)

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).

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

 3^rd,  15^th , 24^th, 28^th

25 

2010

28th

12^th, 19^th, 23^rd , 28th

5

2009

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

 1^st, 7^th, 11^th, 16^th

13th, 25th

 11

2008

None

 None

 18^th, 28^th, 31^st

 1^st, 2^nd, 4^th,5^th,26^th

None

 8

2007

None

None

None

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

None

5

2006

25^th

12^th, 15^th, 29^th, 30^th

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

24^th

None

12

2005

None

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

30^th

1^st, 2^nd, 4^th, 10^th

3^rd, 4^th, 5^th

13

2004

None

None

15^th, 21^st, 22^nd

None

None

3

2003

None

None

2^nd, 3^rd, 30^th

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

None

8

2002

None

24^th, 25^th

9^th, 10^th, 25^th

6^th, 9^th, 31^st

None

8

2001

None

26^th

11^th, 25^th

3^rd, 4^th, 6^th, 7^th

14^th

8

2000

None

None

17^th

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

2^nd, 3^rd, 4^th, 8^th

15