The AQI is measured on a scale from 0 to 500, with the lower the number, the healthier the air. (Getty Creative) But many Angelenos aren’t sure if the AQI tells the full story, especially given how ...

PHILADELPHIA (CBS) -- Air Quality Index (AQI) refers to the Environmental Protection Agency's scale regarding the health impact of air quality and pollution in the U.S., regulated under the Clear Air ...

PHILADELPHIA (WPVI) -- With smoke blowing into the Philadelphia region from the wildfires in Canada, you may have heard a lot about the Air Quality Index or AQI. But what it is, exactly? The Air ...

According to data from the Central Pollution Control Board, the Air Quality Index remained in the ‘very poor' category at ...

The national capital, Delhi, woke up to a thick layer of smog blanketing the city with the Air Quality Index (AQI) at 380, ...

Delhi recorded a thick blanket of smog on December 15, 2025, with the Air Quality Index (AQI) settling at 450, according to the Air Quality Early Warning System (AQEWS) for Delhi at 11 am, which falls ...

The IMD issued an orange alert for fog on Saturday and the AQEWS predicted the air quality index to climb into the 400+ ...

Delhi’s air quality remained in the ‘Very Poor’ category on Friday with an average AQI of 374, while Noida slipped into ...

Delhi air pollution worsens as AQI stays in the ‘very poor’ category today. Check area-wise air quality levels and pollution ...

At 6 am, the capital's overall Air Quality Index (AQI) was 387, in the ‘very poor’ category, a decline from 356 the previous ...