The index is on a scale of 0 to 500 (0 being clean air and 500 being heavy pollution). Outside the US, you can check the World Air Quality Index for air pollution ratings across the globe.

This measure, based on data from the Environmental Protection Agency, evaluates states on the number of days the Air Quality Index in counties was not rated “good.” U.S. News calculated a ...

SINGAPORE, March 11 (Reuters) - Only seven countries met World Health Organization (WHO) air quality standards last year, data showed on Tuesday, as researchers warned that the war on smog would ...

Fewer than one in five global cities met World Health Organization air pollution standards in 2024 with Central and South ...

BANGKOK: Residents of the Thai capital once again face unhealthy air quality today, as IQAir places Bangkok firmly in the top ...

STEINACH, Switzerland, March 11, 2025 /PRNewswire/ -- IQAir today announced the release of its 7th annual World Air Quality Report, highlighting alarming trends of the world's most polluted ...

Only Seven Countries Met WHO Air Quality Standards in 2024, Data Shows By David Stanway SINGAPORE (Reuters) -Only seven countries met World Health Organization (WHO) air quality standards last ...

People brave "severe plus" smog shrouding New Delhi, India, on November 15 when the National Capital Region's Air Quality Index hit 424, according to the Central Pollution Control Board.