Washington Smoke Map

*The map above is not able to display all state air quality monitors. Click here to see all monitors in Washington: WA Ecology Air Monitors

Note: Some users might notice intermittent discrepancies in colors shown on the map of air quality monitors above, and those reported on the Department of Ecology's official page. This is because Ecology believes their method of calculating the air quality category (i.e. “Good”, “Moderate”, Unhealthy” etc) is more protective of public health in Washington. If in doubt as to which better represents public health risk, use the more stringent of the two (i.e. the map showing worse air quality).

Wednesday, August 26, 2015

8/26/2015 Estimating Air Quality in Areas without a Monitor

Wildfire smoke can cause serious air quality impacts in areas that are not well represented by an existing monitor. If you're in an area like this and want to get a rough estimate of the state of the air, the procedure and table below can help.

The procedure for using this visibility index is as follows:
1. Determine the limit of your visual range by looking for distant targets or familiar landmarks such as mountains, hills, or buildings at known distances (miles). The visual range is that point at which these targets are no longer visible.
2. Ideally, the viewing of any distance targets should be made with the sun behind you. Looking into the sun or at an angle increases the ability of sunlight to reflect off of the smoke, and thus making the visibility estimate less reliable.
3. Once distance has been determined, follow this simple guide:

  • If over 15 miles, the air quality is generally good. 
  • Between 5-15 miles, air quality is moderate and beginning to deteriorate, and is generally healthy, except possibly for smoke sensitive persons. The general public should avoid prolonged exposure if conditions are smoky to the point where visibility is closer to the 5 mile range. 
  • If under 5 miles, the air quality is unhealthy for young children, adults over age 65, pregnant women, and people with heart and/or lung disease, asthma or other respiratory illness. These people should minimize outdoor activity.  
  • If under 3 miles, the air quality is unhealthy for everyone. Young children, adults over age 65, pregnant women, and people with heart and/or lung disease, asthma or other respiratory illness should avoid all outdoor activities.  
  • If under 1 mile, the air quality is hazardous. Everyone should avoid all outdoor activities. 

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