AirVisual included cities which have the following criteria: 1) a>50% “Calendar Availability” for 2018 2) >41% “Average Daily Availability” (equivalent to >10h of readings within 24h) per day that data is available. “Calendar Availability” indicates the percentage of days of the year which have at least one hour’s measurement from at least 1 station. “Average Daily Availability” indicates the mean proportion of 24h for which those calendar days have hourly readings (from at least 1 station)
Great Lakes Air Quality Alert: Canadian Wildfire Smoke
Smoke from Canada’s northern forest fires has drifted into the Great Lakes region. Find out more about this air quality event.
Wildfire Map Spotlight: North Rim Fires, Arizona
A historic lodge has been destroyed as a pair of wildfires burns along the Grand Canyon’s North Rim. Find out more about these fires.
Wildfire Map Spotlight: Western Colorado Fires
Wildfires in western Colorado are causing evacuations as unhealthy wildfire smoke drifts across the state. Find out more about these fires.
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What is data availability rule?
What is data availability rule?