2011 Scorecard

Current as of December 2, 2011

1997 8-Hour Standard*

Monitor Location	Exceedance Days Per Monitor (84 ppb)	4th-Highest Concentration (ppb)	Design Value** (Attainment Test)
Arlington Mun. Airport (TARRANT)	1	80	79
Cleburne Airport (JOHNSON)	2	79	79
Corsicana Airport (NAVARRO)	0	74	69
Dallas Exec. Airport (DALLAS)	1	82	79
Dallas Hinton Street (DALLAS)	2	84	73
Dallas North No.2 (DALLAS)	8	88	82
Denton Airport South (DENTON)	12	95	83
Eagle Mountain Lake (TARRANT)	2	80	83
Frisco (COLLIN)	10	91	81
Ft. Worth Northwest (TARRANT)	3	82	81
Granbury (HOOD)	0	76	76
Grapevine Fairway (TARRANT)	10	91	86
Greenville (HUNT)	0	77	69
Italy (ELLIS)	0	75	69
Kaufman (KAUFMAN)	0	74	68
Keller (TARRANT)	15	97	90
Midlothian (ELLIS)	1	80	74
Parker County (PARKER)	6	88	79
Pilot Point (DENTON)	10	91	82
Rockwall Heath (ROCKWALL)	1	80	77

* 1997 8-Hour Federal Ozone Standard < 85 ppb.

** 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 85 parts per billion (ppb).