The Air Quality Index is a tool used by the Environmental Protection Agency (EPA) in order to communicate outdoor air quality. It’s a scale of 0 to 500, with the higher number indicating the air ...
The flatlining of the AQI at 500 is one reason why Delhi’s AQI on November 18 was only 494. Fifteen stations hit their maximum value , while other stations had an AQI somewhat below 500 ...
Severe (401–500): Breathing difficulties for healthy individuals; significant risk for those with heart or lung ailments, ...
Here’s what to know. The Air Quality Index is a tool used by the Environmental Protection Agency (EPA) in order to communicate outdoor air quality. It’s a scale of 0 to 500, with the higher number ...