2017 Design Values and Monitor Scorecard

Current as of July 17, 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)	2	0	64	64
Cleburne Airport (JOHNSON)	1	1	69	71
Corsicana Airport (NAVARRO)	0	1	65	63
Dallas Executive Airport (DALLAS)	0	0	58	62
Dallas Hinton St. (DALLAS)	0	1	68	72
Dallas North No.2 (DALLAS)	1	1	66	70
Denton Airport South (DENTON)	3	1	71	78
Eagle Mountain Lake (TARRANT)	1	1	69	71
Fort. Worth Northwest (TARRANT)	2	1	70	71
Frisco (COLLIN)	2	0	68	72
Granbury (HOOD)	1	0	65	67
Grapevine Fairway (TARRANT)	0	1	67	73
Greenville (HUNT)	0	0	61	60
Italy (ELLIS)	0	0	63	63
Kaufman (KAUFMAN)	0	0	61	60
Keller (TARRANT)	3	0	72	72
Midlothian (ELLIS)	0	1	63	63
Parker County (PARKER)	1	0	64	70
Pilot Point (DENTON)	0	1	67	73
Rockwall Heath (ROCKWALL)	1	0	61	64

^	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).