2015 END OF SEASON OZONE SCORECARD
Tulsa Area Ozone Trends Chart

2 Exceedance Days: August 7th; October 15th

Through December 31, 2015  

Monitor Site 2015 Highest 8-Hr Ozone Averages (ppm)*
(1st through 4th highest daily readings)
DESIGN VALUE
3-Year Average

of the 4th highest readings
2012 4th High 2013 4th High 2014 4th High 1st Highest
date
2nd Highest
date
3rd Highest
date
4th Highest
date
2012-2014
3-Yr Avg
2013-2015 
3-Yr Average
West (#144 Mannford) .070
14-Oct
.070
15-Oct
.068
6-Jun
.063
25-Sep
.072 .065
.083 .068 .066
East (#178 Lynn Lane)  .076
15-Oct
 .069
7-Aug
.067
30-Jun
.065
9-Jun
.071 .065
.082 .068 .063
Central (#1127 Tulsa)  .084
7-Aug
 .070
6-Jun
.069
15-Oct
.068
1-May
.074 .068
.085 .072 .065
North (#137 Skiatook)  .075
7-Aug
.070
6-Jun
.066
3-Aug
.066
14-Aug
.073
.067
.084 .071 .065
South (#174 Glenpool) .067
30-Apr
.064
29-Jun
.064
26-Sep
.061
6-Jun
.071 .064
.083 .069 .062
An Ozone Exceedance = .076 ppm or greater
Exceedances are unique unhealthy air days, yet Exceedances are not the same as 'Violating the Ozone Standard'.
The EPA National Ambient Air Quality Standard (NAAQS) for ozone is determined by the monitor with the highest 'Design Value'. This ozone 'Design Value', uses ozone data (level, reading, value...NOT the number of unhealthy exceedance days). Specifically, the Design Value is calculated from the 4th highest value for the year - averaged over a 'rolling' 3-year average. In the table above, the middle columns - the ones with dates - show this year's 1st through 4th highest daily readings per monitor. The 4th highest column is the one that 'counts' at year end - the one that is averaged with the 4th highest readings from the two previous years to determine each monitor's Design Value.

A Violation of the 2008 ozone standard occurs when the 3-year average (which is the Design Value) is .076 ppm or greater. A Violation of the new 2015 ozone standard occurs when the Design Value is .071 or greater.

The last column in the table above indicates our Design Value is .068 ppm. This comes from the Central monitor averaging 2013's 4th high value (.072), 2014's 4th highest value (.065) and our current 2015 4th highest reading of .068 ppm (each monitor is averaged uniquely and the standard uses no rounding).

Does our 2013-2015 Design Value meet the EPA ozone standard? Yes! Our Design Value is .068 ppm *
(Our 2012-2014 Design Value was .074 ppm)

*2015 data is preliminary and subject to change as a result of the ODEQ/EPA verification process

Tulsa Area Ozone Alert! Days (2000 - present)

Year May June July August September TOTAL Alert! Days

2015

10th 1

2014
    24th       1

2013
   13th  12th 22nd  4th 4
2012  18th  25th, 26th, 27th, 28th, 29th  10th, 11th, 12th, 13th, 21st, 22nd, 28th  2nd, 3rd, 6th, 7th, 8th, 10th  4th, 5th 21
2011   3rd, 15th , 24th, 28th  2nd , 6th , 8th, 9th, 15th, 29th 3rd, 4th, 5th, 17th, 20th, 21st, 24th, 25th, 26th, 27th, 28th 1st, 2nd, 3rd, 13th 25
2010  28th     12th, 19th, 23rd , 28th   5
2009   24th, 25th, 26th, 27th, 30th 1st, 7th, 11th, 16th 13th, 25th    11
2008     18th, 28th, 31st 1st, 2nd, 4th, 5th, 26th   8
2007       2nd, 3rd, 14th, 15th, 16th    5
2006  25th 12th, 15th, 29th, 30th 1st, 2nd, 17th, 19th, 20th, 21st 24th   12
2005   21st, 22nd, 24th, 25th, 26th 30th 1st, 2nd, 4th, 10th 3rd, 4th, 5th 13
2004     15th, 21st, 22nd     3
2003     2nd, 3rd, 30th 6th, 7th, 23rd, 26th, 27th   8
2002   24th, 25th 9th, 10th, 25th 6th, 9th, 31st   8
2001   26th 11th, 25th 3rd, 4th, 6th, 7th 14th 8
2000     17th 1st, 2nd, 3rd, 4th, 15th, 16th, 23rd, 24th, 25th, 26th  2nd, 3rd, 4th, 8th 15