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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 ...
However a review of satellite measurements taken between 2010 and 2013 found several places located along a ridge between Dome A and Dome F which recorded even lower temperatures of −92 to −94 °C (−134 to −137 °F), with the lowest reliable temperature being −93.2 °C (−135.8 °F) recorded in 2010, at , at an elevation of 3,900 m ...
Fastest ever recorded: 484±32 km/h (301±20 mph) (3-second gust); calculated by a DOW (Doppler On Wheels) radar unit in the 1999 Bridge Creek–Moore tornado between Oklahoma City and Moore, Oklahoma, USA, 3 May 1999. Recently, the wind speeds were re-examined and adjusted to a maximum official wind speed of 321 mph (516.6 km/h).
In January 1994, the air temperature was recorded at 18 below zero in Erie County. This was later matched on Feb. 16, 2015. Cold blast from the past: Lowest air temperature recorded in Erie was 30 ...
Alaska holds the all-time U.S. record. The mercury plummeted to 80 degrees below zero on Jan. 23, 1971, in Prospect Creek, north of Fairbanks.
“In 2017, the PurpleAir company began to deploy low-cost air quality sensors which now provide real time PM2.5 data throughout the U.S. and abroad,” Masri says, noting that you can purchase ...
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.
Thus an AQI of 100 does not mean twice the pollution of AQI at 50, nor does it mean twice as harmful. While an AQI of 50 from day 1 to 182 and AQI of 100 from day 183 to 365 does provide an annual average of 75, it does not mean the pollution is acceptable even if the benchmark of 100 is deemed safe. This is because the benchmark is a 24-hour ...