Roanoke Valley AQI PM 2.5 Days
(24-hour average)
* information based on DEQ website data,
may vary slightly from officially verified data *
Updated through October 31, 2008.
This chart
reflects AQI for PM 2.5 only. It does not include ozone
data, which is also factored into the daily AQI for the
Roanoke Valley. Thus, this chart tracks the daily PM 2.5
24-hour average from midnight to midnight each day.
| AQI = Air Quality Index Undetermined days are days when either
the Roanoke area particulate matter monitor
provided incomplete data or the Virginia
Department of Environmental Quality (DEQ) website
provided incomplete data.
There are two other PM 2.5
monitors in the Roanoke Valley, but they do not
provide the "real time" data used for
AQI.
|
AQI
CODE
|
Color
Code (Description)
|
PM
2.5 in
micrograms per cubic meter
|
| 0 - 50 |
Green (Good) |
0.0 ug/m3 - 15.4
ug/m3 |
| 51 - 100 |
Yellow (Moderate) |
15.5 ug/m3 - 35.4
ug/m3 |
| 101 - 150 |
Orange (Unhealthy for Sensitive
Groups) |
35.5 ug/m3 - 65.4
ug/m3 |
| 151 - 200 |
Red (Unhealthy) |
65.5 ug/m3 - 150.4
ug/m3 |
| 201 - 300 |
Purple (Very Unhealthy) |
150.5 ug/m3 - 250.4
ug/m3 |
| 301 + |
Maroon (Hazardous) |
250.5 ug/m3 + |
|
