2015 Ozone Scorecard – Tulsa Air Quality

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