
Air Quality Index Scale and Color Legend - aqicn.org
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution. Active children and adults, and people with respiratory disease, such as …
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 - 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.
Air Quality Index (AQI) | AirNow.gov
The Air Quality Index (AQI) tells you how clean or polluted your outdoor air is and the associated health effects that may be of concern.
Patient Exposure and the Air Quality Index | US EPA
Mar 20, 2025 · 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?
Air quality index - Wikipedia
An air quality index (AQI) is an indicator developed by government agencies [1] to communicate to the public how polluted the air currently is or how polluted it is forecast to become. [ 2 ] [ 3 ] As air pollution levels rise, so does the AQI, along with the associated public health risk.
Unhealthy Air Quality – What To Do | AQI Numbers - University …
Feb 25, 2022 · AQI of 101 to 150 is unhealthy air quality for sensitive groups, such as people with asthma or other lung conditions. People without these conditions usually do not have symptoms. The color code is orange.
World's Air Pollution: Real-time Air Quality Index
Check out the real-time air pollution map, for more than 80 countries. Can not find your city on the map? The GAIA air quality monitor uses laser particle sensors to measure in real-time PM2.5 and PM10 particle pollution, which is one of the most harmful air pollutants.
Air Quality Index Report | US EPA - U.S. Environmental …
Mar 28, 2025 · This report provides Air Quality Index annual summary information, including maximum AQI values and the count of days in each AQI category. Read more about what's in this report. Use the query tool below to get AQI reports for one state, county, or CBSA at a time.
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.