The EPA's Air Quality Index can tell you whether breathing outside air can be harmful. Here's how to read the scale to plan ...

As fires burn through the Northwest, doctors are warning that flames aren’t the only dangers – smoke can also cause long-lasting health risks.

Dhaka, the overcrowded capital city of Bangladesh, has ranked fourth on the list of cities with the worst air quality with an ...

The air quality index, or AQI, measures the air quality and level of health concern it presents as measured by the Environmental Protection Agency. How does AQI work?

People who are sensitive to smoke might want to limit their time outside Sunday and Monday, due to some wildfires burning in the area.

The Air Quality Index (AQI) — which measures the concentration of pollutants in the air — seemed to confirm all was well in the L.A. atmosphere, with low numbers that suggested clean, ...

Ideally, you want the AQI to be no higher than 50, assuming that you aren’t Hedorah, that Smog Monster from that 1971 Godzilla movie. An AQI of 100 corresponds to the level set as the short-term ...

The Air Quality Index, or AQI, is the primary system used to warn the public when air pollution is dangerous. It’s based on data collected from 5,000 air monitors across the country.

The air quality index (AQI) in many LA regions looks good, but that doesn't mean the air is safe. Why it matters: The AQI in your weather app doesn't account for all pollutants caused by wildfires.

The Air Quality Index is a scale used for daily reporting of how clean or polluted the air is, and what health effects might be of concern.

An air quality alert was issued by the National Weather Service in Milwaukee-Sullivan at 9:26 a.m. on Wednesday, July 16.