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).

Tuesday, August 1, 2017

8/1/2017 Afternoon satellite image of smoke over Washington

The Tuesday afternoon satellite image from today shows the extent of the smoke episode over Washington caused largely by smoke coming in from Canada and spreading south. More of the state monitors are now showing deteriorating air quality and conditions will likely get worse before they improve. (The corner of the state that is white? It's still waiting for the satellite to pass over.)

Monitor conditions as of 2pm Aug. 1

Follow the link below to see an animation of predicted smoke movement from the Canadian fires through tomorrow afternoon. (You may need to click on the right facing triangle under the image to start the animation.) It looks like much of the state will experience impacts.



  1. Do you know why there is a discrepancy between the monitors on the Ecology page, and what you post on yours...I realize the readings are 1 hour apart....but on yours it shows Moderate, but the ecology one that is 1 hour behind yours is showing Unhealthy. Both are for Wenatchee, both I believe are from Fifth St. Curious too, it didn't seem like in years gone by the delay was 2-3 hours for posting --- is the system different than what it was? I post for the Chelan County EM page, and haven't seen the differences before that I am seeing today. Thanks, Eileen

    1. Eileen: readings on the ECY map is shown in Pacific standard time year round, while the blog map (above) uses eastern daylight time (at this time of the year). Updating of values happens a few minutes past the hour, but individual monitors can lag behind due to various reasons. Differences in colors are due to differences in Washington's WAQA vs EPA's Air Quality Index. In a nutshell, WAQA transitions from Moderate to Unhealthy for Sensitive Groups at a lower concentration than the AQI does, and is therefore more protective of public health. There are also differences between the algorithms used to calculate EPA's AQI vs WA's WAQA, i.e. how many previous hours of data it uses and how it treats them... This makes the EPA method a lot more responsive to rapid changes in air quality. Please call me if you need to talk about this further.

  2. You all have done a really nice job with this blog. That Canadian smoke simulation through August 2 is impressive. Thanks.

  3. I am unable to load the smoke map anymore. It appears that you have exceeded the limit for the Google API. Is that because there are too many people looking at the smoke map? I find this page very helpful in knowing the air quality in various regions around WA. Thank you for keeping this up to date. I hope you can get it working again.

    Here is the message that comes up when I load the map:

    "You have exceeded your daily request quota for this API. We recommend enabling billing to get a higher quota: https://developers.google.com/maps/documentation/javascript/usage"

  4. Haze of smoke around Centralia washington

  5. We are in Pacific county and have a thick haze of smoke lingering here as well


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