The 2004 Ozone Season Summary

The Tulsa Area is meeting the 8-hour standard for ozone!

The Tulsa Area 2004 ozone season was successful and all Tulsa area monitors meet the 8-hour revised National Ambient Air Quality Standard for Ozone.  (See the 3-year averages column for 2002-2004 in the table below.)

There were 3 Ozone Alert! Days called during the 2004 season and ALL monitors remained within the standard on ALL days. 

2004 Tulsa Area Ozone Season ScoreCard

8-Hour Ozone Standard (ppm)

 

 

 

Monitor

Site

2004 8-Hr. Ozone Averages
(1st through 4th highest readings)

 

4th Highest at end of season is key reading, and is averaged with the 2003 and 2002 4th highest readings

 

An Ozone Exceedance  = .085 or greater

Meeting the Ozone Standard?

 

Yes!  The 3-Yr Avg. (of 4th Highest readings) is  .084 or lower

 

A Violation of the standard = .085 or greater

 

 

 

1st highest
(date)

2nd highest
(date)

3rd highest
(date)

4th Highest (date)

2001-2003 Avg. of 4th Highs

3-YR AVG

 2002--2004 Avg. of 4th Highs

2005 4th  High Key Target
(2005 4th high can  be no higher)

2001
4th High

2002
4th High

2003
4th  High

 

Central Tulsa (#1127)

0.069
20-Jul

0.069
11-Sep

0.068
21-Jul

0.068
12-Sep

0.080

0.076

.106

0.081

0.080

0.080

 

North     (#137 Skiatook)

0.073
11-Sep

0.073
30-Sep

0.072
2-Sep

0.071
20-Jul

0.083

0.079

.100

0.084

0.083

0.083

 

South    (#174 Glenpool)

0.080
1-Jun

0.074
10-Aug

0.073
23-Mar

0.071
30-Sep

0.081

0.079

.097

0.077

0.082

0.086

 

East   (#178 Lynn Lane)

0.081
1-Jun

0.076
14-Jul

0.076
9-Aug

0.073
20-Jul

0.080

0.079


.097

0.078

0.080

0.084

 

West   (#144 Mannford)

0.074
20-Jul

0.073
1-Sep

0.072
18-Aug

0.071
30-Sep

N.A.

N.A.

.102

N.A.

N.A.

0.081

An exceedance of the 8-hr ozone standard is  .085 ppm or greater

Explanation of the Ozone Standard.
The 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 daily eight-hour average at each monitor. A violation occurs when the 3-year average (of the 4th highest value) is greater than .084 ppm. Example: the North (Skiatook) monitor: 2002 4th highest reading was .083, that monitor’s 4th highest in 2003 was .083, and the 2004 4th highest for that monitor is.071. Thus, .083 + .083 + .071 divided by 3 = .079 ppm, which meets the standard (the standard applies no rounding.)

In April of 2004, the EPA designated the
Tulsa area in attainment of the revised ozone standard. All counties in the Tulsa area meet all national ambient air quality standards. 

Tulsa Area
Ozone Alert! Days

Year

No. of
Days

2004

3

2003

8

2002

8

2001

8

2000

15

1999

17

1998

10

Tulsa Area
# of Days Ozone Standard was Exceeded

Year

No. of
Days

2004

0

2003

9

2002

6

2001

7

2000

10

1999

14

1998

9