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 Index is used nationwide to measure the severity of air pollution and categorize the health risks that are involved with various levels of pollution.

AirNow.gov Air Quality Index (AQI) Basics for Ozone and Particle Pollution. airnow.gov Ways To Protect Yourself When AQI Is Above 150. Even small amounts of exposure to poor air can be harmful to ...

This measure, based on data from the Environmental Protection Agency, evaluates states on the number of days the Air Quality Index in counties was not rated “good.” U.S. News calculated a ...

The data that goes into the Air Quality Index comes from 5,000 air monitors across the country, including local, state, tribal, and federal reporting.

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, healthy air.

The smallest particles tracked in the Air Quality Index—those with a diameter of 2.5 microns or smaller—are also the most dangerous because they can be inhaled deep into the lungs and even ...

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 ...

Residents can also use AirNow, a part of the U.S. Air Quality Index, and check local conditions by searching their ZIP Code or city. AccuWeather also has an AQI feature that lists the current ...