2017 Design Values and Monitor Scorecard

Current as of September 14, 2017

2015 National Ambient Air Quality Standards for Ozone

Monitor Location	Exceedance Days Per Monitor (70 ppb)*	Exceedance Days Per Monitor (75 ppb)**	4th-Highest Concentration (ppb)	Design Value^ (Attainment Test)
Arlington Municipal Airport (TARRANT)	3	2	71	67
Cleburne Airport (JOHNSON)	5	3	75	73
Corsicana Airport (NAVARRO)	1	0	65	63
Dallas Executive Airport (DALLAS)	0	0	63	64
Dallas Hinton St. (DALLAS)	1	3	75	74
Dallas North No.2 (DALLAS)	2	5	77	74
Denton Airport South (DENTON)	6	1	72	78
Eagle Mountain Lake (TARRANT)	1	2	69	71
Fort. Worth Northwest (TARRANT)	4	2	73	72
Frisco (COLLIN)	5	1	72	74
Granbury (HOOD)	1	1	66	67
Grapevine Fairway (TARRANT)	3	2	73	75
Greenville (HUNT)	0	0	66	62
Italy (ELLIS)	1	0	66	64
Kaufman (KAUFMAN)	1	0	62	61
Keller (TARRANT)	5	2	75	73
Midlothian (ELLIS)	0	1	67	65
Parker County (PARKER)	1	0	65	70
Pilot Point (DENTON)	1	1	68	74
Rockwall Heath (ROCKWALL)	1	0	67	66

^	The highest three-year average of the fourth-highest concentration of each monitor. This is the region's attainment test for ozone. The annual fourth-highest daily maximum eight-hour average ozone concentration at each monitor must be less than or equal to 70 parts per billion (ppb).