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Air Quality Index (AQI) | AirNow.gov
https://www.airnow.gov/aqi/
WEBLocal air quality can affect our daily lives. Like the weather, it can change from day to day. EPA developed the Air Quality Index, or AQI, to make information available about the health effects of the five most common air pollutants, and how to avoid those effects.
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Air Quality | US EPA
https://www.epa.gov/air-quality
WEBFeb 28, 2024 · The U.S. Air Quality Index (AQI) is EPA's index for reporting air quality. Every day the AQI tells you how clean or polluted your outdoor air is, along with associated health effects that may be of concern.
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AirNow.gov
https://www.airnow.gov/
WEB2024-02-07. EPA has updated the Air Quality Index (AQI) for particle pollution, at the same time the Agency updated the annual health-based standard for this harmful pollutant. AirNow will reflect the updates when they become effective -- 60 days after the rule is published in the Federal Register.
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Air Quality Index (AQI) Basics - AirNow
https://www.airnow.gov/aqi/aqi-basics/
WEBWhat is the U.S. Air Quality Index (AQI)? The U.S. AQI is EPA’s index for reporting air quality. How does the AQI work? Think of the AQI as a yardstick that runs from 0 to 500. The higher the AQI value, the greater the level of …
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AirNow Interactive Map - US EPA
https://gispub.epa.gov/airnow/
WEBInteractive Map of Air Quality. Monitors. NowCast AQI. Contours. NowCast AQI. Show green contours. Show green contours. Ozone and PM.
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Air Quality Index Report | US EPA - U.S. Environmental …
https://www.epa.gov/outdoor-air-quality-data/air-quality-index-report
WEBNov 9, 2023 · 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 …
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Air Data: Air Quality Data Collected at Outdoor Monitors ... - US EPA
https://www.epa.gov/outdoor-air-quality-data
WEB6 days ago · Last updated on April 12, 2024. This site provides air quality data collected at outdoor monitors across the United States, Puerto Rico, and the U. S. Virgin Islands. Users can download, output, view or visualize the data.
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How is the AQI calculated? | US EPA
https://www.epa.gov/outdoor-air-quality-data/how-aqi-calculated
WEBAug 28, 2023 · How is the AQI calculated? Refer to the AQI Technical Assistance Document for equations on how to calculate the AQI from pollutant concentration. Return to Frequent Questions about AirData. Last updated on August 28, 2023.
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Using Air Quality Index | AirNow.gov
https://www.airnow.gov/aqi/aqi-basics/using-air-quality-index/
WEBWhat it is: The U.S. Air Quality Index, or AQI, is EPA’s tool for communicating daily air quality. It uses color-coded categories and provides statements for each category that tell you about air quality in your area, which groups of people may be affected, and steps you can take to reduce your exposure to air pollution.
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Air Data Basic Information | US EPA - U.S. Environmental …
https://www.epa.gov/outdoor-air-quality-data/air-data-basic-information
WEBDec 8, 2023 · Air Quality Index (AQI) Values Levels of Health Concern Colors; When the AQI is in this range:..air quality conditions are:...as symbolized by this color: 0-50 : Good : Green : 51-100: Moderate: Yellow : 101-150 : Unhealthy for Sensitive Groups: Orange: 151 to 200: Unhealthy : Red: 201 to 300 : Very Unhealthy: Purple: 301 to 500: Hazardous: …
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