{"id":12122,"date":"2025-03-11T15:22:02","date_gmt":"2025-03-11T15:22:02","guid":{"rendered":"https:\/\/site.itshrt.com\/worldnews\/most-polluted-cities-in-the-world-and-the-u-s-revealed-in-annual-report\/"},"modified":"2025-03-11T15:22:02","modified_gmt":"2025-03-11T15:22:02","slug":"most-polluted-cities-in-the-world-and-the-u-s-revealed-in-annual-report","status":"publish","type":"post","link":"https:\/\/site.itshrt.com\/worldnews\/most-polluted-cities-in-the-world-and-the-u-s-revealed-in-annual-report\/","title":{"rendered":"Most polluted cities in the world \u2014 and the U.S. \u2014 revealed in annual report"},"content":{"rendered":"<p> <script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6606220950177433\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- ItShrt World News -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-client=\"ca-pub-6606220950177433\"\r\n     data-ad-slot=\"1882483372\"\r\n     data-ad-format=\"auto\"\r\n     data-full-width-responsive=\"true\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\r\n<br \/>\n<\/p>\n<div id=\"\">\n<p>Los Angeles had the <span class=\"link\"><a href=\"https:\/\/www.cbsnews.com\/news\/what-to-do-during-air-quality-alert-masks-protect-wildfire-smoke\/\" target=\"_blank\" data-invalid-url-rewritten-http=\"\">lowest air quality<\/a><\/span> in the United States in 2024, according to the annual <a href=\"https:\/\/www.iqair.com\/us\/world-air-quality-report\" target=\"_blank\" rel=\"nofollow noopener\">World Air Quality Report<\/a> from IQAir.\u00a0<\/p>\n<p>The annual report looks at data from more than more than 40,000 <span class=\"link\"><a href=\"https:\/\/www.cbsnews.com\/news\/state-department-stops-reporting-air-quality-levels\/\" target=\"_blank\" data-invalid-url-rewritten-http=\"\">air quality monitoring stations<\/a><\/span> across 8,954 locations in 138 countries, territories and regions, according to IQAir, an air technology company based in Switzerland.<\/p>\n<p>The rankings are based on the annual average of concentrated micrograms of an air pollutant per cubic meter of air. The World Health Organization recommends 5 micrograms of pollutant per cubic meter. \u00a0<\/p>\n<h2>Which countries have the lowest air quality?\u00a0<\/h2>\n<p>Worldwide, the countries with the worst air quality were Chad, Bangladesh, Pakistan, the Democratic Republic of Congo and India. Chad had 91.5 micrograms of pollutant per cubic meter, IQAir said \u2014 more than 18 times more than <a href=\"https:\/\/www.who.int\/news-room\/feature-stories\/detail\/what-are-the-who-air-quality-guidelines\" target=\"_blank\" rel=\"nofollow noopener\">what the WHO recommends<\/a>. Bangladesh had 78, Pakistan had 73.7, the Democratic Republic of the Congo had 58.2, and India had 50.6 micrograms per cubic meter.\u00a0<\/p>\n<figure class=\"embed embed--type-image is-image embed--float-none embed--size-large\"><span class=\"img embed__content\"><img fetchpriority=\"high\" alt=\"Air Pollution In Dhaka \" height=\"413\" width=\"620\" class=\" lazyload\" srcset=\"https:\/\/assets2.cbsnewsstatic.com\/hub\/i\/r\/2025\/03\/11\/1393d00d-3734-46f3-a50a-bbf2efcbabdd\/thumbnail\/620x413\/43165119f58404ff8993418b85be2521\/gettyimages-2183774510.jpg?v=23322f4fbf0a01b337c42258c443e9ac 1x, https:\/\/assets3.cbsnewsstatic.com\/hub\/i\/r\/2025\/03\/11\/1393d00d-3734-46f3-a50a-bbf2efcbabdd\/thumbnail\/1240x826\/7c26c8c63d913204347dec13a235c91a\/gettyimages-2183774510.jpg?v=23322f4fbf0a01b337c42258c443e9ac 2x\"\/><\/span><figcaption class=\"embed__caption-container\"><span class=\"embed__caption\">People move through a dusty, busy road in Dhaka, Bangladesh, on November 12, 2024.\u00a0<\/span><\/p>\n<p>                  <span class=\"embed__credit\"><\/p>\n<p>                Syed Mahamudur Rahman\/NurPhoto via Getty Images<\/p>\n<p>                          <\/span><br \/>\n              <\/figcaption><\/figure>\n<p>But Byrnihat, India was the most polluted metropolitan area in 2024, the IQAir report said. The city had an annual average concentration of 128.2 micrograms per cubic meter of air. India was home to six of the nine most polluted global cities, IQAir said.<\/p>\n<p>One hundred and twenty-six countries, or 91.3% of the world, exceeded the WHO guideline, according to the report.\u00a0<\/p>\n<p>Conditions on the ground in various countries can affect the amount of pollutants per cubic meter, IQAir said. Wildfires in the Amazon caused levels in parts of Brazil to nearly quadruple in the fall. The entire continent of Africa only has one moniotring station for every 3.7 million people, IQAir said, which may lead to inaccurate data for the region.\u00a0<\/p>\n<h2>What parts of the U.S. have the best and worst air quality?\u00a0<\/h2>\n<p>Most cities in the United States had between 5.1 and 15 micrograms of pollution per cubic meter of air, according to IQAir. A number of cities, especially along the West Coast, New England and in the Southwest, had between 0 and 5 micrograms of pollution per cubic meter, meeting WHO guidelines.\u00a0<\/p>\n<p>The major city with the worst air pollution was Los Angeles, California. The smaller municipality of Ontario, California, had the most pollution of any city, the report said.\u00a0<\/p>\n<figure class=\"embed embed--type-image is-image embed--float-none embed--size-large\"><span class=\"img embed__content\"><img alt=\"Seattle Ferry terminal shows Seattle Ferry and Seattle skyline at sunset, Washington State \" height=\"348\" width=\"620\" class=\" lazyload\" srcset=\"https:\/\/assets3.cbsnewsstatic.com\/hub\/i\/r\/2025\/03\/11\/4c41aac7-064a-414f-bb16-2ffd216c313f\/thumbnail\/620x348\/c2512b6a4be4e9ee10977ac37c0351fd\/gettyimages-2191208102.jpg?v=23322f4fbf0a01b337c42258c443e9ac 1x, https:\/\/assets2.cbsnewsstatic.com\/hub\/i\/r\/2025\/03\/11\/4c41aac7-064a-414f-bb16-2ffd216c313f\/thumbnail\/1240x696\/082ac6f136e22d2bd592bdfa561ddd1f\/gettyimages-2191208102.jpg?v=23322f4fbf0a01b337c42258c443e9ac 2x\"\/><\/span><figcaption class=\"embed__caption-container\"><span class=\"embed__caption\">Seattle Ferry terminal shows Seattle Ferry and Seattle skyline at sunset, Washington State.<\/span><\/p>\n<p>                  <span class=\"embed__credit\"><\/p>\n<p>                Joe Sohm\/Visions of America\/Universal Images Group via Getty Images<\/p>\n<p>                          <\/span><br \/>\n              <\/figcaption><\/figure>\n<p>Seattle, Washington was the cleanest major city in the U.S., according to IQAir. \u00a0<\/p>\n<h2>What parts of the world have the best air quality?\u00a0<\/h2>\n<p>Australia, the Bahamas, Barbados, Estonia, Grenada, Iceland and New Zealand met the WHO guideline for air quality. The cleanest metropolitan area in the world was Mayaguez, Puerto Rico, with an annual average concentration of 1.1 micrograms per cubic meter of air.\u00a0<\/p>\n<p>The cleanest region is Oceania, which includes Australia, New Zealand, Papua New Guinea and hundreds of smaller islands. Fifty-seven percent of cities in the region met the WHO guideline, the IQAir report found.\u00a0<\/p>\n<p>Seventeen percent of cities included in the report met the annual WHO guideline, IQAir said. That&#8217;s an <span class=\"link\"><a href=\"https:\/\/www.cbsnews.com\/news\/wildfires-ozone-smoke-air-quality\/\" target=\"_blank\" data-invalid-url-rewritten-http=\"\">increase from 2023<\/a><\/span>, when just 9% of cities met the guideline.\u00a0<\/p>\n<p>&#8220;While this marks some progress, much more work has yet to be done to protect human health, especially that of children,&#8221; IQAir said in the report.\u00a0<\/p>\n<figure class=\"embed embed--type-video embed--type-content_video is-video embed--float-left embed--size-medium \"><figcaption class=\"embed__caption-container\"><a href=\"https:\/\/www.cbsnews.com\/video\/wildfire-smoke-is-just-part-of-the-reason-air-quality-has-been-bad\/\" class=\"embed__headline-link\" data-invalid-url-rewritten-http=\"\"><\/p>\n<p>          <span class=\"embed__icon\"><br \/>\n            <svg viewbox=\"0 0 32 32\" aria-hidden=\"true\"><use xlink:href=\"#icon-video\"\/><\/svg><\/span><\/p>\n<p>          <span class=\"embed__headline\">Wildfire smoke is just part of the reason air quality has been bad<\/span><\/p>\n<p>          <span class=\"embed__video-duration\">02:25<\/span><\/p>\n<p>                      <\/a><\/p>\n<\/figcaption><\/figure>\n<h2>Why is air quality so important?\u00a0<\/h2>\n<p><span class=\"link\"><a href=\"https:\/\/www.cbsnews.com\/news\/health-effects-of-wildfire-smoke-bad-air-quality-toxic\/\" target=\"_blank\" data-invalid-url-rewritten-http=\"\">Air pollution<\/a><\/span> is a &#8220;critical threat to both human health and environmental stability, IQAir CEO Frank Hammes <a href=\"https:\/\/www.iqair.com\/newsroom\/waqr-2024-pr\" target=\"_blank\" rel=\"nofollow noopener\">said in a news release<\/a> announcing the findings of the report.\u00a0<\/p>\n<p>Ninety-nine percent of the world&#8217;s population lives in areas that do not meet recommended air quality guideline levels, according to WHO. Air pollution is the second leading global risk factor for death. In 2021, 8.1 million deaths worldwide could be attributed to <span class=\"link\"><a href=\"https:\/\/www.cbsnews.com\/news\/climate-change-air-quality-unhealthy-wildfires-first-street\/\" target=\"_blank\" data-invalid-url-rewritten-http=\"\">air pollution<\/a><\/span>, IQAir said.\u00a0<\/p>\n<p>Exposure to concentrated micrograms of an air pollutant caused about 58% of those deaths, IQAir said. Exposure to micrograms of pollutants can contribute to and exacerbate health conditions including asthma, cancer, stroke and lung diseases. Children may face issues with respiratory and developmental health. \u00a0<\/p>\n<p>    <!-- data-recirc-source=\"queryly\" --><\/p>\n<aside class=\"component list recirculation component--type-recirculation \">\n<p><h3 class=\"component__title\">More from CBS News<\/h3>\n<\/p>\n<\/aside>\n<p><!-- tags --><\/p>\n<div class=\"content-author\">\n      <a href=\"https:\/\/www.cbsnews.com\/team\/kerry-breen\/\" class=\"content-author__name\" data-invalid-url-rewritten-http=\"\">Kerry Breen<\/a><\/p>\n<div class=\"content-author__bio\">\n<div class=\"content-author__full-information\">\n<p class=\"content-author__text\">Kerry Breen is a news editor at CBSNews.com. A graduate of New York University&#8217;s Arthur L. Carter School of Journalism, she previously worked at NBC News&#8217; TODAY Digital. She covers current events, breaking news and issues including substance use.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6606220950177433\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- ItShrt World News -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-client=\"ca-pub-6606220950177433\"\r\n     data-ad-slot=\"1882483372\"\r\n     data-ad-format=\"auto\"\r\n     data-full-width-responsive=\"true\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\r\n<br \/>\n<br \/><a href=\"https:\/\/www.cbsnews.com\/news\/most-polluted-cities-united-states-worldwide-iq-air-annual-report\/\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Los Angeles had the lowest air quality in the United States in 2024, according to the annual World Air Quality<\/p>\n","protected":false},"author":1,"featured_media":12123,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[3777],"class_list":["post-12122","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-world","tag-air-quality"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Most polluted cities in the world \u2014 and the U.S. \u2014 revealed in annual report - World News<\/title>\n<meta name=\"description\" content=\"The countries with the worst air quality included Bangladesh and India, according to an annual report from IQAir.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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