2007 Ozone Scorecard

Tulsa’s ozone design value is .080 ppm, which remains

in compliance with the EPA’s National Ambient Air Quality Standard

  2007 Total Number of Days Standard was Exceeded:   2         2007 Total Number of Monitor Exceedances:  3         

2007 Ozone Alert! Days:  Aug. 2, Aug. 3, Aug. 14, Aug. 15, Aug 16

Monitor

Site

2007 8-Hr. Ozone Averages
(1st through 4th highest readings)

*4th Highest at end of each season  is averaged with the prior 2-yrs 4th highest readings.  (2007 + 2006 + 2005  4th highest readings divided by 3)

An Ozone Exceedance= .085 or greater

Is Our Current 3-Yr. Average Meeting the Ozone Standard?

Yes

A Violation of the standard = (3-yr avg of ) .085 or greater

 2008 4th  High ‘TRIGGER’
A VIOLATION occurs IF 2008’s 4th highest is this value or higher

1st Highest
date

2nd Highest
date

3rd Highest
date

*4th Highest date

2005 – 2007

3-YR Avg

 of 4th Highs

2008

“Trigger”

*4th Highest Ozone Value

*2004
4th High

*2005
4th High

*2006
4th High

 

Central (#1127 Tulsa)

0.078
15-Aug

0.075
22-Sep

0.074
14-Aug

0.072
1-Sep

0.078

 

0.104

0.068

0.082

0.081

 

NORTH   (#137 Skiatook)

0.080
3-Aug

0.075
3-Sept

0.075
 22-Sep

0.073
25-Jul

0.080

0.098

0.071

0.083

0.084

 

South    (#174 Glenpool)

 0.092
13-Aug

0.072
29-Aug

0.070
15-Aug

0.069

21-Apr

0.073

0.108

0.071

0.072

0.078

 

East   (#178 Lynn Lane)

0.095
14-Aug

0.094
13-Aug

0.078

15-Aug

0.075

2-Aug

0.080

0.096

0.073

0.081

0.084

 

West   (#144 Mannford)

0.080
22-Sept

0.072
21-Apr

0.072
15-Aug

0.071
2-Aug

0.077

0.099

0.071

0.076

0.085

All values are in ppm (parts per million)  An exceedance of the 8-hr ozone standard is  .085 ppm or greater
NOTE: all readings are preliminary and unofficial until ODEQ-EPA QA/AQ Process

 

 

 

 

 

 

 

 

 

 

 

 

 

Explanation of the Ozone Standard

·         The new revised national ozone standard is an eight-hour averaged standard and is calculated by averaging data over a three year time period. This average is taken from the fourth highest eight-hour average at each monitor. A violation occurs when the 3-year average (of the 4th highest value) is greater than .084 ppm. We currently meet the standard, as the current 3-year average at each monitor is less than .085 ppm. The 3-year average (of the 4th highest values) is shown above in green.

·         To determine an ozone violation, the following example calculation is used: North (Skiatook) monitor’s 2003 4th highest reading was .083, its 4th highest in 2004 was .071, the 2005 4th highest for that monitor is  .083.   Thus, .083 + .071 + .083 divided by 3 = .079 ppm, which meets the standard (the standard applies no rounding.)

·         A violation of the Ozone Standard means that our entire Metropolitan Statistical Area of seven surrounding counties including Tulsa County would be eligible for the EPA “Dirty Air List” or Non-Attainment. 

 

 

 

 

Tulsa Area
Ozone Alert! Days

Year

No. of
Days

2007

5

2006

12

2005

13

2004

3

2003

8

2002

8

2001

8

2000

15

1999

17

1998

10