Health Effects Categories
|Very Unhealthy||2.1 - 1.3|
|Unhealthy||5.0 - 2.2|
|Unhealthy for Sensitive Groups||8.7 - 5.1|
|Moderate||13.3 - 8.8|
|Good||> 13.4 +|
The procedure for making personal observation to determine the forest fire smoke index value for local areas without National Weather Station (NWS) or Department of Environmental Quality (DEQ) monitors is:
- Face away from the sun.
- Determine the limit of your visible range by looking for targets
at known distances (miles).
- Visible range is that point at which even high contrast objects
- Use the values above to determine the local forest fire smoke