Each Air Quality Index category, also known as the level of concern, is attached to a certain range of values: Good (green): 0 to 50; Moderate (yellow): 51 to 100; ...

An icon in the shape of a lightning bolt. Impact Link. ... According to AirNow, a website and app run by the EPA, an air-quality index of or under 50 signifies satisfactory air.

The EPA breaks the Air Quality Index into a few categories with different recommendations. Green (0–50): The air is safe to ...

The Air Quality Index does not take into account many gas or particle contaminants that are produced during wildfires, particularly when houses, cars and other man-made materials go up in flames.

The national average air quality index in 2023 was 38, according to IQAir, a Swiss air quality technology company. More than 100 nations had cleaner air , on average, than the United States, and ...

The Air Quality Index (AQI) is used by various government agencies to report how clean or polluted the air is in your area. For example, you may have spotted this metric popping up in local ...

The air quality in New York City and across the northeast is the worst since record-keeping began in 1999 because of the wildfire smoke from Canada, officials said. Learn more about the index from ...

As smoke from Canadian wildfires has made its way into the U.S., it is important to understand how the air quality index works. Here's what each color code means.