Report reveals 2024's most polluted cities, countries

Map Shows US Cities With Worst Air Pollution
According to the ranking in IQAir's 2024 World Air Quality Report, these are the 10 U.S. cities with the worst pollution in North America: While eight of the most polluted U.S. cities in North America were in California, with the remaining two in Texas, the two least polluted regional cities were both located in Hawaii: Waimea and Ocean View.
Report reveals 2024's most polluted cities, countries: Which US cities made the list?
Data from more than 40,000 air quality monitoring stations in 138 countries, territories and regions were analyzed for the report, IQAir said.
Most polluted cities in the world — and the U.S. — revealed in annual report
The countries with the worst air quality included Bangladesh and India, according to an annual report from IQAir.
The list of the world’s top 20 most polluted cities is out. All but one are in Asia
The cities with the worst air pollution in North America were Ontario, Bloomington and Huntington Park – all in Southern California
Kathmandu ranks fifth among world's most polluted cities
Kathmandu's air quality has deteriorated, making it the fifth most polluted city in the world with an AQI of 180, according to the Air Quality Index.Beijing, Kampala, Delhi, and Kuwait occupy the top four spots,
20 most polluted cities in the world
Air pollution remains a serious global challenge, with some cities experiencing dangerously high levels of fine particulate matter (PM2.5). According to the latest IQAir report, 19 of the 20 most polluted cities in the world are in Asia,
The 15 fastest-growing and fastest-shrinking cities in the US
Populations rose in many US cities last year. The two fastest-growing metros were in Florida.
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USA TODAY snowfall tracker shows how much snow has fallen in Indiana cities this season
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