7 Cleanest Air Cities in the World: Breathe Easy Here

Sunday, 1 June 2025 14:15

Discover the 7 cities with the cleanest air in the world, according to airly.org, based on average PM2.5 levels. Learn what makes these cities stand out for their air quality and how they prioritize sustainable living.

illustration cleanest air cities © copyright ChiemSeherin - Pixabay

Air pollution is a major global concern, responsible for millions of premature deaths annually. The World Health Organization (WHO) reports that nearly 99% of the world's population lives in areas with air quality that fails to meet health standards. This highlights the urgent need for global action to improve air quality.

The WHO encourages governments to prioritize policies that improve industrial practices, energy generation, transportation systems, city planning, electricity production, waste management, agricultural practices, and healthcare services. While many parts of the world struggle with air pollution, some cities stand out for their clean air.

This article explores seven cities with the cleanest air in the world, based on average PM2.5 levels measured over 12 months in 2022, according to airly.org.

7 Cities Leading the Way in Clean Air

1. Zurich, Switzerland (0.51 micrograms per cubic meter)

Zurich, Switzerland, boasts the cleanest air in the world with an average PM2.5 level of 0.51 micrograms per cubic meter. The city's efficient public transportation system significantly reduces reliance on personal vehicles, lowering emissions. Zurich also champions sustainable living with a strong focus on clean energy and low-emission transportation.

2. Reykjavik, Iceland (1.9 micrograms per cubic meter)

Reykjavik, Iceland, comes in second with an average PM2.5 level of 1.9 micrograms per cubic meter. The city harnesses geothermal energy extensively, minimizing its dependence on fossil fuels. Reykjavik's geographical location and strong ocean winds help disperse potential pollutants, contributing to its clean air.

3. Launceston, Australia (3.68 micrograms per cubic meter)

Launceston, Australia, maintains an average PM2.5 level of 3.68 micrograms per cubic meter. The city's abundance of green spaces acts as natural air filters. Launceston maintains high standards for industry and transportation while diligently monitoring open burning activities to keep air pollution levels low.

4. Honolulu, Hawaii (4.04 micrograms per cubic meter)

Honolulu, Hawaii, enjoys an average PM2.5 level of 4.04 micrograms per cubic meter. Situated in the middle of the Pacific Ocean, Honolulu benefits from constant exposure to ocean winds that clear pollutants from the air. The city also has a strong sense of environmental awareness among its residents, contributing to its clean air.

5. Bergen, Norway (4.39 micrograms per cubic meter)

Bergen, Norway, has an average PM2.5 level of 4.39 micrograms per cubic meter. The city's surrounding mountains act as natural barriers against pollution. Bergen's efficient, low-emission public transportation system further reduces the number of cars on the road, leading to cleaner air.

6. Wollongong, Australia (4.51 micrograms per cubic meter)

Wollongong, Australia, boasts an average PM2.5 level of 4.51 micrograms per cubic meter. The city's proximity to the Pacific Ocean allows for strong ocean winds that cleanse the air. Wollongong has also implemented strict policies to limit industrial emissions, contributing to cleaner air.

7. Trondheim, Norway (4.77 micrograms per cubic meter)

Trondheim, Norway, rounds out the list with an average PM2.5 level of 4.77 micrograms per cubic meter. The city focuses on sustainable energy, with a significant portion of its energy supply coming from renewable sources like hydropower. Trondheim embraces green policies like low-emission transportation and the development of green spaces.

Key Takeaways for Creating Cleaner Cities

These cities demonstrate that clean air is achievable through thoughtful planning, sustainable practices, and community engagement. Their success offers valuable insights for creating healthier and more sustainable cities globally.

Key takeaways include:

  • Invest in public transportation: Efficient public transportation systems reduce reliance on personal vehicles, lowering emissions and improving air quality.
  • Embrace renewable energy: Transitioning to renewable energy sources like solar and wind power reduces reliance on fossil fuels, contributing to cleaner air.
  • Promote green spaces: Green spaces act as natural air filters, absorbing pollutants and improving air quality.
  • Implement strict pollution control measures: Stringent regulations on industrial emissions and open burning activities significantly reduce air pollution levels.
  • Foster environmental awareness: Educating citizens about the importance of clean air and sustainable living encourages individual actions that contribute to cleaner cities.

As the world grapples with the serious effects of air pollution, these examples provide hope and inspiration for building a healthier future for all. By learning from these cities and adopting their best practices, we can create a world where clean air is a reality for everyone.

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