What is AQI (Air Quality Index) and how is it calculated? What is AQI (Air Quality Index) and how is it calculated?

aqi indicates wifi health within an ap's cell, as indicated by a scale from 0 (unusable) to 100 (perfect) airtime utilization shows how much of the access point airtime is being utilized by the clients that are associated to it there could be many reasons why the aqi is impacted some reasons are high utilization of the ap channel, clients using a slow data rate, co channel or adjacent channel interference, or nearby non 802 11 wifi devices like bluetooth devices, wireless video cameras, or outdoor microwave links the ap itself has a channel switching mechanism to move out of the operating channel if the noise is in the channel is high if we receive an aqi alert we can check what is causing the aqi to be poor is it noise, obss load, or non wifi interference? we can't do much for bursty noise and non wifi interference since the 2 4 ghz band generally has more interference and congestion using the 5ghz band can help clients avoid interference, increasing the overall performance of the network we use the following parameters to calculate the aqi self chan util, noise floor, channel load, obss chan util, total rx chan util, total chan free, total tx chan util, and total non wifi util definitions of these parameters are at the bottom of the article example of bad aqi as you can see from the below screenshot here the aqi is dropped to 0 which is below the threshold value 35, and this will generate alerts on nile portal saying aqi is impacted for 2 mins /3 mins bad aqi example of good aqi here as you see aqi is above 35 and marked as 98 which indicates that the air quality is good and that no issues are ongoing with the aps nile portal aqi statistics aqi statistics how to check the aqi alerts from the nile portal in detail click on the air quality tile under infrastructure select the respective building in red air quality status 2\ this will list out all the air quality related events on the bottom right of the page aqi events 3\ check for the detailed view of aqi with the respective time/location detail view of aqi 4 select the time slot aqi measuring time slot 5\ click on the red circle in the map which indicates the ap that has generated bad aqi measuring bad aqi causing ap 6\ we should be seeing the threshold and aqi values for the respective time frame definitions of aqi calculation parameters self chan util self channel util will be the sum of total tx chan util and total rx chan util noise floor the noise floor is the signal created from adding up all the unwanted signals within a measurement system channel load the percentage of the channel usage in time obss chan util obss chan util reflects the co channel wifi interference seen in the current channel total rx chan util rx utilization is the percent of radio channel utilization in rx, receive traffic from client total chan free percentage of radio channels that are free for transmission total tx chan util tx channel utilization is the percent of radio channel utilization in tx, sent traffic from ap total non wifi util total non wifi util reflects the non wifi channel utilization seen in the channel which is the sum of non wifi interference and adj channel interference seen in the current channel