AQI Basics | AirNow.gov
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 …
Air Quality Index (AQI) | AirNow.gov
Every day the Air Quality Index (AQI) tells you how clean or polluted your outdoor air is, along with associated health effects that may be of concern. Local air quality affects how you live and breathe. Like the weather, it can change from day to day or even hour to hour.
About Air Quality | Air Quality | CDC - Centers for Disease …
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.
What is the difference between the US AQI and WHO air quality ...
Oct 13, 2016 · Aiming to offer guidance in reducing the health impacts of air pollution, the World Health Organization (WHO) created its first air quality guideline (AQG) in 1987. These have since been updated, with the latest edition of WHO AQG for ambient air pollutants published in 2021.
• On February 7, 2024, the U.S. Environmental Protection Agency (EPA) announced a final rule to strengthen the nation’s National Ambient Air Quality Standards (NAAQS) for fine particle pollution, also known as fine particulate matter (PM2.5) or soot.
AQI value of 50 represents good air quality with little or no potential to affect public health, while an AQI value over 300 represents air quality so hazardous that everyone may experience serious effects. An AQI value of 100 generally corresponds to the national air quality standard for the pollutant, which is the level EPA has set
Air Quality Index - National Weather Service
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.
WHO Global Air Quality Guidelines - World Health Organization …
Sep 22, 2021 · What are the WHO Global Air Quality Guidelines? Based on the extensive scientific evidence currently available, the guidelines identify the levels of air quality necessary to protect public health worldwide.
Air Quality | US EPA - U.S. Environmental Protection Agency
Oct 28, 2024 · Learn about air quality and how it affects health. Discover how to check air quality forecasts, learn about what causes poor air quality, and find out how to help make our air cleaner every day.
What is the air quality index (AQI)? | IQAir
Aug 4, 2018 · Here’s how each of the AQI categories are represented, how they can impact human health, and some recommendations for what to do when the AQI has reached a higher category. The categories are listed from least harmful to human health (“good”) to the most harmful (“hazardous”).