Air Quality Index, or AQI, and PM2.5, particulate matter which measures 2.5 micrometers or less, are not the same thing. But both do refer to how polluted the air is, just in different ways. AQI, an ...

There has been a lot of talk about air quality levels as nearly the entire tri-state area has been engulfed by smoke coming down from wildfires in Canada. But what do all the numbers actually mean?

There has been a lot of talk about air quality levels as nearly the entire tri-state area has been engulfed by smoke coming down from wildfires in Canada. But what do all the numbers actually mean?

Bengaluru maintains low and stable PM2.5 levels, showcasing better air quality than northern cities, according to a new ...

CHENNAI: Chennai’s air quality deteriorated in 2025, with PM2.5 pollution levels rising across all seasons compared to 2024, ...