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A city's Overall Score is the average of its scores across all factors and categories. The highest Overall Score ranked "Highest Risk" (No. 1) for grass allergies and the lowest "Lowest Risk" (No ...
A pollen count is a measurement of the number of pollen grains in a given volume of air. Pollen counts, and forecasts of pollen conditions, are routinely produced and reported to the public because high aerial pollen concentration is associated with increased rates of allergic reaction for those with conditions such as hay fever and asthma .
Pollen allergy seasons can be very different depending on where in the U.S. you are. Here are the 10 best and worst cities for people with allergies.
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Below is a list of 526 cities sorted by their annual mean concentration of PM2.5 (μg/m 3) in 2022. [1] [2] By default the least polluted cities which have fewest particulates in the air come first. Click on the arrows next to the table's headers to have the most polluted cities ranked first. Please note that constraints exist in this type of ...
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. Air quality in the database is represented by the annual mean concentration of particulate matter ( PM10 and PM2.5, i.e. particles smaller than 10 or 2.5 micrometers, respectively).
The study evaluated 197 cities in the U.S. and revealed that a warming climate results in more freeze-free days each year, which gives plants more time to grow and release allergy-inducing pollen.
The combination of pollution and pollen levels, and uninsured citizens caused the Asthma and Allergy Foundation of America to name Atlanta as the worst American city for asthma sufferers to live in. [22] However in 2010, all counties in the Atlanta metro area began requiring yearly emissions testing for all motor vehicles, with the exception of ...