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2. List of most-polluted cities by particulate matter concentration

   en.wikipedia.org/wiki/List_of_most-polluted...

   This list contains the top 500 cities by PM2.5 annual mean concentration measurement as documented by the World Health Organization covering the period from 2010 to 2022. The January 2024 version of the WHO database contains results of ambient (outdoor) air pollution monitoring from almost 5,390 towns and cities in 63 countries.

3. Air pollution in India - Wikipedia

   en.wikipedia.org/wiki/Air_pollution_in_India

   Air Quality Index (AQI) is a number used to communicate the level of pollution in the air and it essentially tells you the level of pollution in the air in a given city on a given day. The AQI of Delhi was placed under the "severe-plus category" when it touched 574, by the System of Air Quality and Weather Forecasting And Research. [49]

4. NowCast (air quality index) - Wikipedia

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

   PM 2.5 AQI of US monitors, calculated utilizing NowCast, courtesy US EPA PM2.5 AQI map, calculated utilizing NowCast, courtesy US EPA. The PM (particulate matter) 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 - particles less than 10 micrometers ...

5. Air quality index - Wikipedia

   en.wikipedia.org/wiki/Air_quality_index

   The most commonly used air quality index in the UK is the Daily Air Quality Index recommended by the Committee on the Medical Effects of Air Pollutants (COMEAP). [39] This index has ten points, which are further grouped into four bands: low, moderate, high and very high. Each of the bands comes with advice for at-risk groups and the general ...

6. Air pollution in Bhiwadi - Wikipedia

   en.wikipedia.org/wiki/Air_Pollution_in_Bhiwadi

   It has the air quality index of 106.2 in 2021 [7] [8] [9] and 228 in 2022. [10] It is also the most polluted city in India [11] whose pollution is more than air pollution in Delhi. [9] [12] The PM 2.5 of this city is twenty times more than the maximum level recommended by the World Health Organization. [13]

7. Air pollution - Wikipedia

   en.wikipedia.org/wiki/Air_pollution

   Air pollution is the presence of substances in the atmosphere that are harmful to humans and other living beings, or cause damage to the environment. Air pollution can be chemical, physical or biological. [1]

8. Ghazipur landfill - Wikipedia

   en.wikipedia.org/wiki/Ghazipur_landfill

   Workers on top of Ghazipur landfill in 2013. The Ghazipur landfill is a landfill waste dumping site established in 1984. It is located in Ghazipur, a village in the eastern district of Delhi, India.

9. Non-attainment area - Wikipedia

   en.wikipedia.org/wiki/Non-attainment_area

   The state and tribal recommendations must be based on available air quality data from the given area. [6] The EPA reviews the recommendations from state and tribal governments and the local air quality data, and awards one of three classifications to a region within 2 years of the addition or revision to the NAAQS . [6] [7] Classifications include: