Historic Activity for the 8-Hour Ozone Standard

Additional Information:

Air Quality Monitoring Site	1998-2000	1999-2001	2000-2002	2001-2003	2002-2004	2003-2005	2004-2006	2005-2007	2006-2008	2007-2009	2008-2010
Arlington Municipal Airport (C61)	-	-	-	89	87	87	87	84	79	77	79
Cleburne Airport (C77)	-	-	90	90	90	89	88	86	83	83	80
Corsicana Airport (C1051)^	-	-	-	-	-	-	-	-	-	-	-
Dallas Exec. Airport (C402)	-	62	82	84	88	88	88	86	82	78	78
Dallas Hinton St. (C401/161)	-	68	91	90	89	91	88	84	74	67	67
Dallas North No. 2 (C63)	76	94	90	87	88	89	89	87	80	81	78
Denton Airport South (C56/157/163)	102	101	100	98	96	93	95	94	91	85	80
Eagle Mountain Lake (C75)	-	-	95	97	94	95	96	95	89	86	85
Frisco (C31)	101	99	93	88	89	90	93	88	83	79	77
Ft. Worth Northwest (C13)	99	98	96	97	94	95	95	92	83	79	78
Granbury (C73)	-	-	84	84	81	81	84	85	81	77	75
Grapevine Fairway (C70)	-	-	95	100	99	94	94	93	87	84	82
Greenville (C1006/198)	-	-	-	-	-	79	80	76	70	66	64
Italy High School (C650)	-	-	-	-	-	-	-	-	-	69	68
Kaufman (C71)	-	-	71	74	74	74	76	76	73	70	66
Keller (C17)	97	98	98	100	98	96	95	92	87	86	86
Midlothian OFW (C52)	-	-	-	-	-	-	-	-	75	73	72
Parker County (C76)	-	-	86	89	86	88	88	91	84	81	75
Pilot Point (C1032)	-	-	-	-	-	-	-	-	81	77	78
Rockwall Heath (C69)	-	-	84	82	82	82	80	78	75	75	74

- Insufficient Data; ^ Activated 2009;

Shaded squares indicate violation of 1997 8-hour ozone standard. (Attainment is reached when the fourth-highest ozone concentration is less than 85 ppb when averaged over a consecutive 3-year period.)