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US AQI

PM2.5

#MAJOR CITYUS AQI

1

238

2

Chiang Mai, Thailand

181

3

173

4

Shenyang, China

165

5

Kathmandu, Nepal

157

6

Dhaka, Bangladesh

153

7

Busan, South Korea

152

8

152

9

Incheon, South Korea

141

10

Kaohsiung, Taiwan

110

SEE FULL RANKING

Most polluted cities

See a ranking of 2022’s most polluted cities.

Most polluted countries

See a ranking of 2022’s most polluted countries.

9 Spring allergy tips to help reduce symptoms

9 Spring allergy tips to help reduce symptoms

Some flowers are better and worse for those with asthma, or multiple chemical sensitivities. Learn more

IQAir World Air Quality Report 2022 Finds Only 5% of Countries Meet WHO PM2.5 Air Pollution Guideline

The 2022 World Air Quality Report analyzed PM2.5 air pollution measurements from air monitoring stations around the world. Learn more.

Revealing the Invisible: One activist's quest in Milwaukee

When Langston Verdin went looking for asthma triggers in his city, he chose air quality monitoring for the job. Learn more.

Returning to work after COVID-19

Here are recommendations for returning to the workplace safely and avoiding future infections after shelter-in-place or quarantine orders are lifted.

Swiss Embassy continues to choose IQAir

The Swiss Embassy in China chose IQAir to clean its indoor air for the fifth year in a row. Learn more.

Why you shouldn’t buy fake filters

Whether you call them discount or aftermarket, fake IQAir filters are inferior to certified IQAir system filters in almost every way imaginable. Here's three (damn good) reasons you should avoid these fake filters.

more air quality news

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Stay Informed. Download #1 air quality app

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Air quality around the world

Real-time air quality report and air pollution forecast

Afghanistan

Albania

Argentina

Buenos Aires Cordoba

Australia

Adelaide Brisbane Canberra Melbourne Perth Sydney

Austria

Bahrain

Bangladesh

Chittagong Dhaka Khulna Rajshahi

Belarus

Belgium

Brussels Liège

Brazil

Belem Belo Horizonte Brasilia Curitiba Fortaleza Manaus Recife Rio de Janeiro Salvador Sao Paulo

Brunei

Bandar Seri Begawan

Bulgaria

Cambodia

Canada

Calgary Edmonton Montreal Ottawa Toronto

Chile

China

Colombia

Barranquilla Bogota Medellin

Croatia

Cyprus

Czech Republic

Brno Ostrava Plzen Prague

Denmark

Egypt

Alexandria Cairo Giza

Estonia

Finland

France

Lyon Marseille Nice Paris Toulouse

Germany

Berlin Düsseldorf Frankfurt am Main Hamburg Munich Stuttgart

Ghana

Greece

Athens Thessaloniki

Guatemala

Hungary

Iceland

India

Indonesia

Bandung Bekasi Jakarta Makassar Medan Surabaya

Iran

Ahvaz Isfahan Karaj Kermanshah Mashhad Qom Rasht Shiraz Tabriz Tehran Urmia Zahedan

Ireland

Israel

Italy

Japan

Chiba Hamamatsu Kawasaki Kitakyushu Kobe Kumamoto Kyoto Nagoya Osaka Sakai Sapporo Tokyo Yokohama

Kazakhstan

Almaty Shymkent

Kosovo

Kyrgyzstan

Latvia

Lithuania

Macao SAR

Malaysia

George Town Kuala Lumpur

Mexico

Ciudad Juárez Culiacan Guadalajara Leon Mexico City Monterrey Nezahualcóyotl Tijuana Zapopan

Moldova

Monaco

Mongolia

Morocco

Casablanca Marrakesh Sale Tangier

Netherlands

Amsterdam Rotterdam

Norway

Pakistan

Faisalabad Gujranwala Hyderabad Karachi Lahore Multan Peshawar Rawalpindi

Panama

Philippines

Antipolo Caloocan Cebu City Davao City Manila Quezon City

Poland

Gdansk Krakow Lodz Poznan Warsaw Wroclaw

Portugal

Qatar

Romania

Russia

Chelyabinsk Kazan Krasnodar Krasnoyarsk Moscow Novosibirsk Omsk Perm Saint Petersburg Samara Saratov Ufa Volgograd Voronezh Yekaterinburg

Saudi Arabia

Dammam Jeddah Mecca Medina Riyadh Ta'if

Serbia

Slovakia

Slovenia

South Africa

Cape Town Durban East London Johannesburg Port Elizabeth Pretoria Soshanguve Vereeniging

South Korea

Busan Daegu Daejeon Gwangju Incheon Seoul Suwon Ulsan

Spain

Barcelona Madrid Malaga Valencia

Sweden

Switzerland

Basel Bern Zurich

Taiwan

Kaohsiung Taichung Tainan Taipei Taoyuan

Thailand

Bangkok Chiang Mai Chiang Rai Mae Chan Nakhon Ratchasima Pai Phuket

Turkey

Adana Ankara Antalya Bursa Gaziantep Istanbul Kayseri Konya

Ukraine

Dnipro Kharkiv Kyiv Odessa

United Arab Emirates

Abu Dhabi Dubai

United Kingdom

Birmingham Bradford Bristol Cardiff Edinburgh Glasgow Leeds Liverpool London Manchester Nottingham Sheffield

USA

Uzbekistan

Vietnam

Can Tho Da Nang Haiphong Hanoi

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