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  2. Air quality index - Wikipedia

    en.wikipedia.org/wiki/Air_quality_index

    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. Children, the elderly and individuals with respiratory or ...

  3. NowCast (air quality index) - Wikipedia

    en.wikipedia.org/wiki/NowCast_(air_quality_index)

    The PM NowCast is a weighted average of hourly air monitoring data used by the United States Environmental Protection Agency (USEPA) for real-time reporting of the Air Quality Index (AQI) for PM (PM 10 or PM 2.5). The PM NowCast is computed from the most recent 12 hours of PM monitoring data, but the NowCast weights the most recent hours of ...

  4. National Ambient Air Quality Standards - Wikipedia

    en.wikipedia.org/wiki/National_Ambient_Air...

    National Ambient Air Quality Standards. US counties that are designated "nonattainment" for the Clean Air Act's NAAQS, as of September 30, 2017. The U.S. National Ambient Air Quality Standards (NAAQS, pronounced / ˈnæks / naks) are limits on atmospheric concentration of six pollutants that cause smog, acid rain, and other health hazards. [1]

  5. Michigan air quality map: Check if it's bad today in your area

    www.aol.com/michigan-air-quality-map-check...

    The map below displays the current air quality at monitoring sites in the U.S., Canada and Mexico. Air monitoring sites are color-coded based on the pollutant (ozone or particulate matter) with ...

  6. Air quality – live: Noxious smoke eases over US but wildfires ...

    www.aol.com/air-quality-live-york-hits-041201084...

    Thursday 8 June 2023 03:50 , Josh Marcus. Jodie Comer ended her one-woman show Prima Facie early on Wednesday (7 June) due to the “hazardous” air quality in New York. The air quality in the US ...

  7. Air pollution in the United States - Wikipedia

    en.wikipedia.org/wiki/Air_pollution_in_the...

    Anthropogenic air pollution has affected the United States since the beginning of the Industrial Revolution. [2] According to a 2024 report: "39% of people living in America—131.2 million people—still live in places with failing grades for unhealthy levels of ozone or particle pollution."

  8. South Coast Air Basin - Wikipedia

    en.wikipedia.org/wiki/South_Coast_Air_Basin

    South Coast Air Basin. The South Coast Air Basin—SCAB (or SoCAB) is one of several regional air basin areas designated by the state of California, for the purpose of air quality management and air pollution control in Southern California. The SCAB district was created in 1969. [1] and includes all of Orange County and the non-desert regions ...

  9. United States vehicle emission standards - Wikipedia

    en.wikipedia.org/wiki/United_States_vehicle...

    The Clean Air Act of 1963 (CAA) was passed as an extension of the Air Pollution Control Act of 1955, encouraging the federal government via the United States Public Health Service under the then-Department of Health, Education, and Welfare (HEW) to encourage research and development towards reducing pollution and working with states to establish their own emission reduction programs.