Ozone Design Values for the HGB Area
Comparison of ozone design values for the Houston-Galveston-Brazoria area for the years 1991 through 2009.
| Year |
1-Hour Design Value | 8-Hour Design Value (parts per billion) |
|---|---|---|
| 1991 | 220 | 119 |
| 1992 | 210 | 116 |
| 1993 | 200 | 104 |
| 1994 | 202 | 110 |
| 1995 | 189 | 114 |
| 1996 | 188 | 116 |
| 1997 | 199 | 117 |
| 1998 | 196 | 116 |
| 1999 | 203 | 118 |
| 2000 | 199 | 112 |
| 2001 | 185 | 110 |
| 2002 | 175 | 107 |
| 2003 | 175 | 102 |
| 2004 | 170 | 101 |
| 2005 | 169 | 103 |
| 2006 | 153 | 103 |
| 2007 | 153 | 96 |
| 2008 | 147 | 91 |
| 2009 | 127 | 84 |
NOTE: 2009 data is as of October 6, 2009, and is subject to change.
1-hour NAAQS: 125 ppb
8-hour NAAQS (1997): 85 ppb
