Most of the polluted cities in the world – and the US – discovered in an annual report

Los Angeles had lowest air quality In the United States in 2024, according to the yearbook World air quality report from Iqaira.

The annual report is considered by data with more than 40,000 Air quality monitoring cells At 8,954 locations in 138 countries, territory and region, according to Iqair, a air technology company based in Switzerland.

The ranking is based on an annual average concentrated micrograms of air pollutants per cubic meter of air. The World Health Organization recommends 5 micrograms of pollutants per cubic meter.

Which countries have the smallest air quality?

In the world, countries with the worst air quality were Chad, Bangladesh, Pakistan, the Democratic Republic of Congo and India. Chad had 91.5 micrograms of a cubic meter pollutant, Iqair said – more than 18 times more than Which he recommends. Bangladesh had 78, Pakistan had 73.7, the Democratic Republic of Congo had 58.2 and India 50.6 micrograms per cubic meter.

But Byrnihat, India was the most polluted city area in 2024, according to the IQAIR report. The city had an annual average concentration of 128.2 micrograms per cubic meter of air. India was six out of the nine of the most polluted global cities, Iqair said.

One hundred and twenty-six countries, or 91.3% of the world, exceeded the Wholes of the WHO, according to the report.

Conditions on the ground in various countries can affect the amount of pollutants per cubic meter, Iqair said. Amazon fires caused that levels in parts of Brazil were almost doubled in the fall. The entire continent of Africa has only one cell for Monica for every 3.7 million people, Iqair said, which can lead to inaccurate data for the region.

Which parts now have the best and worst air quality?

Most cities in the United States had between 5.1 and 15 micrograms of pollution per cubic meter of air, Iqair said. Numerous cities, especially along the western coast, new England and in the southwest, had between 0 and 5 micrograms of pollution per cubic meter, fulfilling who.

The capital with the worst air pollution was Los Angeles, California. The smaller municipality of Ontario in California had the most pollution of any city, the report said.

Seattle, Washington, was the purest capital in the US, according to Iqair.

Which parts of the world have the best air quality?

Australia, Bahama, Barbados, Estonia, Grenada, Iceland and New Zealand met a Who Air Quality Guideline. The purest city area in the world was Mayaguez, Puerto Rico, with an annual average concentration of 1.1 micrograms per cubic meter of air.

The purest region is Oceania, which includes Australia, New Zealand, Papuo Nova Guinea and hundreds of smaller islands. Fifty-seven percent of the cities in the region met with the WHO guidance, found in the IQAIR report.

Seventeen percent of the cities involved in the report filled the annual Who, IQAIR said. That’s Increase from 2023When only 9% of cities filled the guideline.

“Although this is characterized by certain progress, he still has no longer done to protect human health, especially those children,” Iqair said in the report.

Why is air quality so important?

Air pollution is “a critical threat to both human health and environmental stability, IQAIR CEO of Frank Hammes said in a statement announcing the findings of the reports.

Ninety and nine percent of the world’s population lives in areas that do not meet the recommended levels of air quality guidelines, according to WHO. Air pollution is the second leading global risk factor for death. 2021, 8.1 million deaths around the world could be attributed to air pollutionSaid Iqair.

Exposure to concentrated micrograms of air pollutants caused about 58% of these deaths, Iqair said. Exhibition of micrograms of pollutants can contribute and worsen health conditions, including asthma, cancer, stroke and pulmonary disease. Children can face problems with respiratory and developmental health.