Dec 17, 2024 · How can my patients reduce exposure to ambient ozone and the consequent health effects? What is the Air Quality Index (AQI)? What can I advise my patients to do when air quality is forecast to be unhealthy? How effective are air quality alerts in reducing adverse effects in the real world? Where can the daily AQI be found?

Jan 28, 2025 · The AQI focuses on health effects that may be experienced within a few hours or days after breathing polluted air and uses a normalized scale from 0 to 500; the higher the AQI value, the greater the level of pollution and the greater the health concern.

Sep 18, 2024 · When AQI values are above 100, air quality is unhealthy. The higher the number, the more people are at risk of health harm. What Can You Do to Protect Yourself and Your Family? Don't assume that you're safe just because you're healthy. Air pollution can threaten anyone's health.

This color-coded table shows generically how AQI values correlate with levels of health concern. For a copy of this AQI table, download the booklet, "Air Quality Index - A Guide to Air Quality and Your Health," that explains the AQI and the health effects of major air pollutants, at https://www.epa.gov/airnow/aqi_brochure_08-09.pdf. (629KB, 12 pp.)

The U.S. Air Quality Index (AQI) is EPA's tool for communicating about outdoor air quality and health. The AQI includes six color-coded categories, each corresponding to a range of index values. The higher the AQI value, the greater the level of …

It tells you how clean or unhealthy your air is, and what associ-ated health efects might be a concern. The AQI focuses on health efects you may experience within a few hours or days after breathing unhealthy air.

Members of sensitive groups may experience health effects. The general public is not likely to be affected. Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion. Health warnings of emergency conditions. The entire population is more likely to be affected.

This booklet explains EPA's Air Quality Index (AQI) and the health effects of major air pollutants. You may need a PDF reader to view files on this page. See EPA’s About PDF page to learn more.

The Air Quality Index (AQI) is used for reporting daily air quality. It tells you how clean or polluted your air is, and what associated health effects might be a concern for you. The AQI focuses on health effects you may experience within a few hours or days after breathing polluted air.

May 14, 2024 · Pay attention to the Air Quality Index (AQI). The AQI tells you when high levels of air pollution are predicted and how air pollution affects your health. Finding the AQI is easy. It's on the Web, on many local TV weather forecasts, or you can sign up for free e-mail tools or download the AirNow app. The AQI is easy to use.