Roanoke Valley AQI Ozone Days
(8-hour standard)
* information based on DEQ website data,
may vary slightly from officially verified data *
Updated through October 31, 2008.
This chart
reflects AQI for ozone only using the new 2008 ozone standard. It does not include PM 2.5
data which, beginning in 2005, is now factored into the
daily AQI for the Roanoke Valley. Thus, this chart tracks
the daily ozone 8-hour peaks.
| AQI = Air Quality Index Undetermined days are days when either
the Roanoke area ozone monitor provided
incomplete data or the Virginia Department of
Environmental Quality (DEQ) website provided
incomplete data.
In Roanoke, the ozone season
generally runs from May through September.
|
New 2008 Standard
AQI
CODE
|
Color
Code (Description)
|
Ozone
in parts per billion
|
| 0 - 50 |
Green (Good) |
0 ppb - 59 ppb |
| 51 - 100 |
Yellow (Moderate) |
60 ppb - 75 ppb |
| 101 - 150 |
Orange (Unhealthy for Sensitive
Groups) |
76 ppb - 95 ppb |
| 151 - 200 |
Red (Unhealthy) |
96 ppb - 115 ppb |
| 201 - 300 |
Purple (Very Unhealthy) |
116 ppb - 374 ppb |
| 301 + |
Maroon (Hazardous) |
375 ppb + |
|
