Air Quality Index Scale and Color Legend - aqicn.org
For more information about the pollutants included in the AQI scale, please refer to: PM 2.5 instant-cast scale. Understanding PM 10 vs PM 2.5. Ozone (O 3) AQI scale. Nitrogen Dioxide (NO 2) scale. For more information about AQI scales from other countries, please refer to: Indonesia 🇮🇩.
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 - Wikipedia
The Air Quality Health Index (AQHI) is a scale designed to help understand the impact of air quality on health. It is a health protection tool used to make decisions to reduce short-term exposure to air pollution by adjusting activity levels during increased levels of air pollution.
Air Quality Index - American Lung Association
Sep 18, 2024 · The Air Quality Index, or AQI, is the system used to warn the public when air pollution is dangerous. The AQI tracks ozone (smog) and particle pollution (tiny particles from smoke, power plants and factories, vehicle exhaust, and other sources), as well as four other widespread air pollutants.
Using the Air Quality Index - AirNow
Use the Air Quality Index (AQI) to learn more about your local air quality and the best times for your outdoor activities. What it is: The U.S. Air Quality Index, or AQI, is EPA’s tool for communicating daily air quality.
About Air Quality | Air Quality | CDC - Centers for Disease …
May 14, 2024 · The Air Quality Index (AQI) Sometimes the air quality outdoors may not be safe for everyone. What can you do? Pay attention to the Air Quality Index (AQI). The AQI tells you when high levels of air pollution are predicted and how …
What is the AQI? | AirNow.gov
The Air Quality Index uses numbers from 0 to 500. These numbers are used to decide the AQI color. On days measuring less than 100, the air is clean. If the air is dirtier, the numbers get bigger. On days measuring more than 100, the air can be bad for you to breathe. Here is how the AQI numbers match up with the AQI colors:
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.
How to Use the Air Quality Index | Scientific American
Jun 7, 2023 · The Air Quality Index considers five measurements of air pollution: ground-level ozone, particle pollution, carbon monoxide, sulfur dioxide and nitrogen dioxide.
Air quality index: Color code definitions and what you need to …
Jun 8, 2023 · The AQI is measured on a scale of 0 to 500. The higher the AQI values, the greater the level of air pollution and health concern there is, according AirNow.gov.
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