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The Daily Insight

What city has the most polluted air in the world

Author

Isabella Browning

Updated on April 14, 2026

Nine out of the top 10 most polluted cities are in India. Hotan, in western China’s Xinjiang, had the worst average air quality in 2020, with 110.2.

Who has the most polluted air in the world?

Bangladesh Bangladesh is the most polluted country in the world, with an average PM2. 5 concentration of 77.10, which is nonetheless a decrease from 83.30 in 2019 and 97.10 in 2018.

Where is the cleanest air in the world?

Puerto Rico. In a listing of 106 countries, Puerto Rico tops the spot for the country with the cleanest air in the world.

Which city is most polluted in the world 2021?

Delhi was reported as the most polluted city in the world by the IQAir service with an average AQI of 556, followed by Kolkata in the 4th position and Mumbai in the 6th position. China’s Chengdu and Pakistan’s Lahore also recorded the worst AQI indices in the list of the world’s most polluted cities.

Which city has the best air quality?

#cityUS AQI1Lahore, Pakistan2832Delhi, India2103Karachi, Pakistan1984Kolkata, India193

What is dirtiest country in the world?

PositionCountryPM2.51India1732India1723India1494India146

Which city is the cleanest?

  • Copenhagen, Denmark.
  • Singapore City, Singapore.
  • Helsinki, Finland.
  • Brisbane, Australia.
  • Hamburg, Germany.
  • Stockholm, Sweden.
  • Sapporo, Japan.
  • Calgary, Canada.

Which country has the purest air?

  • Iceland. ​The country has one of the cleanest airs as it’s the least population density and the greenery combines with the scenic beauty makes this one of the most popular travel destinations for people. …
  • Canada.
  • Finland. …
  • Brunei. …
  • Estonia.

What's the most polluted city in America?

  • #8. Phoenix-Mesa, Arizona. …
  • #7. San Jose-San Francisco-Oakland, California. …
  • #6. Fairbanks, Alaska. …
  • #5. Medford-Grants Pass, Oregon. …
  • #4. Los Angeles-Long Beach, California. #4. …
  • #3. Visalia, California. #3. …
  • #2. Fresno-Madera-Hanford, California. #2. …
  • #1. Bakersfield, California. #1.
Where is the cleanest part of the ocean?

The Weddell Sea has been claimed by scientists to have the clearest waters of any ocean in the world. Described by a historian as “the most wretched and dismal region on earth”, due to the flash freezes that caught Shackleton’s ship, its clarity is only belied by the sheer depth of the ocean below.

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Where is the purest oxygen?

  1. Iceland. The country has the cleanest air in the world and that can be credited to the sparse population and immense green cover. …
  2. Canada. …
  3. Finland. …
  4. Brunei. …
  5. Estonia. …
  6. Denmark. …
  7. New Zealand.

Which city has the least air pollution?

  1. Zurich, Switzerland (0.51 µg/m3)
  2. Hobart, Australia (2.73 µg/m3)
  3. Reykjavik, Iceland (3.68 µg/m3)
  4. Launceston, Australia (3.68 µg/m3)
  5. Honolulu, US (4.04 µg/m3)
  6. Vitoria, Brazil (4.10 µg/m3)
  7. Bergen, Norway (4.39 µg/m3)
  8. Wollongong, Australia (4.48 µg/m3)

What is the cleanest state to live in?

  1. 1. California Cleanliness Score: 7.36. California is the cleanest state overall with a cleanliness score of 7.36. …
  2. HawaiiCleanliness Score: 6.94. Hawaii claims second place with a cleanliness score of 6.94. …
  3. WashingtonCleanliness Score: 6.40.

Which animal is cleanest?

Their mucky appearance gives pigs an undeserved reputation for slovenliness. In fact, pigs are some of the cleanest animals around, refusing to excrete anywhere near their living or eating areas when given a choice. Pigs are misunderstood in many ways.

Which states are the most polluted?

  • California.
  • Arizona.
  • Texas.
  • Oregon.
  • Alaska.
  • Pennsylvania.
  • Utah.
  • Ohio.

Which is the most polluted city in the world in 2020?

Hotan, in western China’s Xinjiang, had the worst average air quality in 2020, with 110.2.

What country has the best hygiene?

Finland ranks first in the world for Environmental Health (99.3) and Air Quality (98.8), as well as achieving perfect 100s for Sanitation & Drinking Water and Heavy Metals Exposure. The country also prioritizes forest and wildlife conservation.

What is the dirtiest part of the body?

The mouth is undoubtedly the dirtiest part of your body with the largest amount of bacteria. The mouth comes in more contact with germs than the rectal area.

Which country has no pollution?

1. Sweden. The least polluted country is Sweden with overall score of 2.8/10. The amount of carbon dioxide is 3.83 tonnes per capita per year, and the concentrations of PM2.

Where is the cleanest air in the United States?

Urban Honolulu, Hawaii (tie) Hawaii has some of the cleanest air in the country, even in its urban areas like Honolulu. In fact, the American Lung Association reported that Honolulu County hit a record low in 2019 for the annual average particle pollution.

What US cities have poor air quality?

  • Los Angeles-Long Beach, Calif.
  • Bakersfield, Calif.
  • Visalia, Calif.
  • Fresno-Madera-Hanford, Calif.
  • Phoenix-Mesa, Ariz.
  • Sacramento-Roseville, Calif.
  • San Diego-Chula Vista-Carlsbad, Calif.
  • Salt Lake City-Provo-Orem, Utah.

Which country has most oxygen in the world?

ReporterBelgiumProduct DescriptionMedical oxygenYear2019PartnerWorldTrade Value 1000USD31,855.54

What ocean is the dirtiest?

The most polluted ocean is the Pacific with 2 trillion plastic pieces and one third of the plastic found in this ocean circulates in the North Pacific Gyre.

What beach has the dirtiest water?

  • 3 Goodies Beach in Knox County, Maine.
  • 4 Jersey Park Beach in Lake County, Indiana. …
  • 5 Malibu Pier in Los Angeles County, California. …
  • 6 South Shore Beach, Wisconsin. …
  • 7 Doheny State Beach, California. …
  • 8 Villa Angela State Park, Ohio. …
  • 9 Ontario Beach, New York. …
  • 10 Avalon Beach, California. …

What is the clearest body of water in the world?

Blue Lake, New Zealand A sacred place for the Ngati Apa, a local Maori tribe, this lake is considered the clearest in the world, with a visibility of 76 meters, compared with 80 meters for distilled water, according to The Guardian.

Can you breathe 100% oxygen?

If you breathed pure oxygen, you wouldn’t actually explode. But you would damage your body. … But breathing pure oxygen can sometimes be necessary. Astronauts and deep-sea scuba divers sometimes breathe pure oxygen because they work in very dangerous places.

How long can you breathe 100% oxygen?

Contrary to popular myth, hyperventilating air at ordinary pressures never causes oxygen toxicity (the dizziness is due to CO2 levels dropping too low), but breathing oxygen at pressures of 0.5 bar or more (roughly two and a half times normal) for more than 16 hours can lead to irreversible lung damage and, eventually, …

What is the grossest state in the US?

(WJW) — According to a new study, Virginia is the “grossest” state in the U.S. The study, conducted by Zippia, calculated each state’s grossness based on air quality, the number of landfills and illness spread.

What state has the worst tap water?

Texas. Texas leads the nation with GDP growth and job creation, but it also tops the list with the worst public water ratings in the United States. The most polluted water systems are in the state’s small rural communities, where resources are scarce, and populations are often around 100 people per provider.

Where is the healthiest place to live in the USA?

  • No. …
  • No. 7: Pitkin County, Colorado. …
  • No. 6: San Miguel County, Colorado. …
  • No. 5: Broomfield County, Colorado. …
  • No. 4: Loudoun County, Virginia. …
  • No. 3: Falls Church, Virginia. …
  • No. 2: Douglas County, Colorado. …
  • No. 1: Los Alamos County, New Mexico.

Who is the dirtiest animal in the world?

  • Pig.
  • Raven.
  • Snail.
  • Stork.
  • Swine.
  • Tortoise.
  • Vulture.
  • Weasel.