2018 SEASON OZONE SCORECARD
Tulsa Area Ozone Trends Chart

Exceedance Days: 5 (to date): April 24th, May 7th, May 8th, May 9th, May 26th

Last updated 7/18/18 at 7:50 am

Monitor Site 2018 Highest 8-Hr Ozone Averages (ppm)*
(1st through 4th highest daily readings)
DESIGN VALUE
3-Year Average

of the 4th highest readings
2015 4th High 2016 4th High 2017 4th High 1st Highest
date
2nd Highest
date
3rd Highest
date
4th Highest
date
2015-2017
3-Yr Avg
2016-2018 
3-Yr Average
West (#144 Mannford) .069
7-May
.069
8-May
.068
15-Mar
.068
24-Apr
.063 .065
.063 .064 .064
East (#178 Lynn Lane) .073
24-Apr
.072
8-May
.070
9-May
.069
15-Mar
.064 .065
.065 .063 .064
Central (#1127 Tulsa) .073
9-May
.072
7-May
.071
8-May
.069
15-Mar
.064 .064
.068 .062 .062
North (#226 New Location in Skiatook) .074
7-May
.071
26-May
.070
24-Apr
.070
8-May
  .066
  .064 .064
South (#174 Glenpool) .068
24-Apr
.067
8-May
.066
28-Apr
.065
15-Mar
.063 .064
.061 .064 .065

An Ozone Exceedance = 0.071 ppm or greater
Exceedance days are unhealthy air days and shown in red in the table above.

The EPA Ozone Standard uses the Design Value: Although certainly concerning, exceedance days are not the same thing as 'violating the ozone standard'. The standard uses the 4th highest reading each year and averages it with the 4th highest readings from the two prior years. This 3-year average is called the Design Value. In the table above, the middle columns with dates show this year's 1st through 4th highest daily readings for each 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. Each monitor's readings and averages are calculated uniquely and whichever Design Value is the highest becomes the area's Ozone Design Value.

A Violation of the ozone standard = Design Value 0.071 or greater.

Our current Design Value is 0.066 ppm determined by the NORTH monitor, which is calculated by averaging that monitor's 2016's 4th high value of 0.064, its 2017 4th high of 0.064, and the same monitor's current 2018 4th highest reading of 0.070 ppm (the standard uses no rounding).

Does our 2016-2018 Design Value meet the EPA ozone standard? Yes.

*2018 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

2018

9th, 10th, 17th     3(to date)
2017   8th   3rd 13th 3
2016   20th, 28th  28th 10th  
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