Finding fresh, clean air in busy cities isn’t always easy. Still, some places have managed to keep their air noticeably cleaner than most.
We’ve sifted through all of IQAir’s data from cities around the World to find you the cities with the best air quality. Before we dive in, you might be wondering what it is that can pollute the air you breathe.
Knowing which cities have the best air quality can help you decide where to visit or settle down. Clean air matters for your health and just makes life feel better. So let’s dive in and discover what makes the air in these cities so clean!
25. Canberra, Australia (5.1 µg/m³)
Step into Canberra and you’ll feel the difference—crisp, clean air is the norm. The city’s PM2.5 levels hover around 5.1 micrograms per cubic meter, which is pretty impressive. Most days, the sky stays clear, so you can enjoy outdoor activities without worrying about pollution.
Canberra’s green spaces and parks do a lot to keep the air healthy. Local rules and regular monitoring help, too. Pollution rarely becomes a real issue here.
If you’re someone who values clean air, Canberra’s a solid pick. It’s just one of those places where everyday life feels a bit lighter.
24. Portland Oregon, USA (5.0 µg/m³)
Portland greets you with fresh, clear air. The city usually scores a “Good” on air quality indexes, with PM2.5 levels around 5.0 µg/m³.
You can walk or bike through tree-lined neighborhoods and enjoy all those parks that help keep things clean. The city pushes public transit and electric vehicles, too.
Mild weather and less heavy industry help Portland dodge some of the pollution headaches bigger cities face. Community efforts and local policies keep the air quality strong.
23. Halifax, Canada (4.9 µg/m³)
Halifax’s air feels fresh, almost salty from the Atlantic breeze. With fine particle levels averaging 4.9 µg/m³, it’s one of the cleaner cities for breathing easy.
Ocean winds sweep away pollution, especially compared to busier cities. Halifax’s smaller size and lighter traffic help keep smog and haze rare.
Kids playing outside and folks with sensitive lungs usually have fewer worries here. Local efforts have helped keep the air healthy.
22. Salamanca, Spain (4.9 µg/m³)
Walk through Salamanca and you’ll quickly notice how clean the air feels. PM2.5 levels hover around 4.9 micrograms per cubic meter, which is really low.
There’s hardly any exhaust or haze, so outdoor activities like walking or relaxing in a plaza feel better. The city’s size and light traffic mean you aren’t breathing in as many harmful particles.
Even on busy days, air quality rarely becomes a concern. If you want to avoid pollution, Salamanca makes sense.
21. Bergen, Norway (4.9 µg/m³)
Bergen’s air feels fresh—almost brisk. PM2.5 levels sit at just 4.9 µg/m³, which is low even for Europe.
Frequent wind and rain wash away pollution, so you can enjoy outdoor walks or a bike ride without much worry.
The city limits car traffic and pushes public transit, so you’ll spot plenty of electric buses and trams. Bergen makes it easier for people with asthma or allergies to breathe easy. If you love being outside, this city is a breath of fresh air—literally.
20. Sydney, Australia (4.9 µg/m³)
You might think Sydney, as a huge city, would struggle with air quality. But it does surprisingly well, with PM2.5 levels around 4.9 µg/m³—safe by most standards. Most days, you can head outside without much worry.
Sydney’s environmental rules and plenty of green spaces keep the air fresh. Parks, beaches, and those coastal winds definitely help.
Despite all the cars and action, the air stays cleaner than in many big cities. Air quality updates are posted often, so you can check before heading out if you’re the cautious type.
19. Funchal, Portugal (4.8 µg/m³)
Funchal sits on Madeira Island and offers clean, fresh air most days. The PM2.5 average is just 4.8 µg/m³.
There’s less traffic than in big cities, and green gardens and trees are everywhere. Funchal’s mild ocean climate keeps pollution low, so even during busier times, the air usually stays “Good” on the Air Quality Index.
If you love being outdoors, you can hike, relax by the sea, or hang out at a café without worrying about air pollution.
18. Trondheim, Norway (4.8 µg/m³)
Trondheim’s air feels crisp and clean when you arrive. Pollution levels stay low, around 4.8 micrograms per cubic meter—making it one of Europe’s cleanest cities for air.
The city’s surrounded by forests and waterways, with little heavy industry. Trondheim invests in clean energy and public transportation, so you can bike or take the bus easily. Breezes from the fjords help clear out dust and pollution.
If you care about clean air, you’ll notice the difference here right away.
17. Stockholm, Sweden (4.7 µg/m³)
In Stockholm, the air feels fresh just about everywhere you go. The city usually ranks among Europe’s cleanest capitals for air quality.
Wide parks and water views are everywhere, and smart city planning keeps pollution down. PM2.5 levels stay well below health limits.
Modern public transit, cycling, and green spaces all help. If you’re sensitive to air quality, Stockholm’s a comfortable place to be—even on busy days.
16. Tallinn, Estonia (4.7 µg/m³)
Take a walk in Tallinn and you’ll feel how clean the air is. The PM2.5 average sits at 4.7 micrograms per cubic meter, under the World Health Organization’s recommended limit.
Most days, air quality gets a “Good” rating, so you can enjoy outdoor activities without much concern. Tallinn’s location and green spaces help keep pollution low.
If you have asthma or allergies, breathing here feels easier than in many other cities.
15. Edinburgh, United Kingdom (4.7 µg/m³)
Take a deep breath in Edinburgh and you’ll notice the difference. The city’s air is known for low pollutant levels, and most days the Air Quality Index reads “Good.”
Edinburgh’s PM2.5 level of 4.7 µg/m³ is much lower than in many other places. You can walk, run, or just relax in the city’s parks with cleaner air.
Lots of green spaces and less industry help, and people here often walk or use public transport, which keeps pollution down. If you’re worried about pollen, regular updates help you plan your day.
14. Adelaide, Australia (4.7 µg/m³)
If you’re thinking about clean air, Adelaide definitely stands out in Australia. The city averages around 4.7 µg/m³ for PM2.5—among the country’s best.
You’ll see less smog than in bigger cities like Sydney or Melbourne. Many days, monitors show “Good” or “Moderate” air quality.
Green spaces and strict controls keep air fresh. Walking or biking around feels comfortable, and there’s less dust and haze floating about.
13. Saint-Denis, Réunion (4.6 µg/m³)
Saint-Denis, on the island of Réunion in the Indian Ocean, offers fresh, clean air—fine particle pollution is just 4.6 µg/m³.
There aren’t many cars, and the city focuses on renewable energy, especially solar. Many people use public transportation or just walk.
Green spaces and gardens are everywhere, helping keep the air quality high. If you want to breathe easy and enjoy a mild island climate, Saint-Denis is a great pick. Clean air just comes standard here.
12. Surrey, Canada (4.6 µg/m³)
When you visit Surrey, you’ll notice the air is fresh and clean. This city in British Columbia usually reports some of the lowest PM2.5 levels, averaging around 4.6 µg/m³. Walking outside, you’re not likely to feel stuffy or catch strong scents from car exhaust or factories.
You can spend time in parks, walk your dog, or bike without thinking much about air pollution. The air quality lands in the “Good” range most days, which feels better for your lungs and, honestly, your mood.
People in Surrey get to enjoy clean air, especially compared to bigger cities with more traffic. If you care about breathing easily and getting outdoors, Surrey gives you plenty of chances for both.
11. Albuquerque, USA (4.5 µg/m³)
You might be surprised, but Albuquerque ranks high for clean air in the United States. The city’s air quality sits at around 4.5 micrograms per cubic meter, much lower than in a lot of other places.
Albuquerque gets a boost from its dry climate and the fact that there’s not much heavy industry nearby. Wide-open spaces mean pollution doesn’t get trapped the way it does in crowded cities.
Most days, the air is fresh enough for outdoor activities. In recent years, Albuquerque has worked to keep emissions low, and it shows in the city’s air quality.
10. Honolulu, USA (4.5 µg/m³)
Honolulu consistently ranks as one of the least polluted cities in the world. As the capital of Hawaii and a city with over 337,000 inhabitants, it’s impressive how clean the air still is.
Being on an island in Hawaii helps a lot. Ocean winds push away pollution, and you won’t find many factories here like in big mainland cities.
You can go for a walk, hike, or just hang out at the beach and breathe easy. Even with all the tourists, the air in Honolulu stays clear most of the year.
Locals notice it too. With lower levels of pollutants like PM2.5, you can spend more time outside without worrying much about the air you’re breathing.
9. Wollongong, Australia (4.4 µg/m³)
If you visit Wollongong, you’ll breathe some of the cleanest air in Australia. The city’s average PM2.5 level is just 4.4 µg/m³, which is well below what you’d find in many other urban areas.
Wollongong’s green spaces and its coastal location help keep air pollutants low. It gives you plenty of fresh air, honestly.
Many people enjoy walking by the beach or spending time outdoors here. With these low pollution levels, you can expect clear skies most days.
The main issues that Wollongong faces when it comes to air pollution are bushfires and dust storms. Because the fires are much more likely to start in the summer months, the air is always cleaner in Wollongong in the winter season.
8. Vancouver, Canada (4.3 µg/m³)
The air in Vancouver isn’t quite as good as mountain air, but it’s as close as you can get in a major city. One of the main particles that is checked for when measuring air quality is PM2.5, which are particles less than 2.5 micrometers in size.
You can walk around and actually breathe easy. For the first time, Vancouver hit the World Health Organization’s guideline for good air quality. That’s impressive for a city this size.
There are plenty of parks and ocean breezes that help keep the air fresh. The city’s efforts to control pollution really make a difference—you can feel it compared to more polluted spots.
7. Turku, Finland (4.1 µg/m³)
If you’re looking for clean, fresh air, Turku stands out in Finland. The air quality here is excellent, with a PM2.5 level of just 4.1 µg/m³. Walking around, you might notice how easy it is to breathe.
The city puts in real effort to keep pollution low. There’s a strong focus on green spaces and making buses and bikes easy choices for everyone.
You don’t see much heavy traffic clogging up the streets. Most days, the air stays clear thanks to strict pollution rules and smart city planning.
Spending time outdoors feels good in Turku. Many people like walking, cycling, or enjoying the parks, since the air is so clean.
6. Tampere, Finland (4.0 µg/m³)
If you ever walk around Tampere, you’ll probably notice how fresh the air feels. This Finnish city keeps its air clean, with an average PM2.5 level of just 4.0 µg/m³—much lower than most cities worldwide.
Tampere is surrounded by lakes and forests, which keep pollution down. There isn’t much heavy industry right in the city, so you don’t get a lot of smog or dust.
People here care about the environment. Public transport is popular, and the city supports biking and walking, so there are fewer cars on the road. You can step outside and take a deep breath, knowing the air is safe and clean for you and your family.
5. Reykjavík, Iceland (4.0 µg/m³)
If you visit Reykjavík, you’ll notice the air feels super fresh. The city has an average PM2.5 level of just 4.0 micrograms per cubic meter. That’s below the safety guideline set by the World Health Organization.
Iceland uses a lot of renewable energy, and most homes rely on geothermal heating, so there’s less pollution from burning fossil fuels.
When you walk around, you’ll see how low traffic and wide open spaces help keep the air clean. Even on cold days, the air in Reykjavík feels crisp and clear—easy to breathe, honestly.
For people with asthma or allergies, the low pollution can make a big difference. You can enjoy being outside without worrying about air quality.
4. Uppsala, Sweden (3.5 µg/m³)
When you visit Uppsala, you might notice the clean, fresh air right away. The city has one of the lowest average PM2.5 levels in Europe, measuring around 3.5 micrograms per cubic meter.
You could spend time outdoors without worrying much about pollution. Local parks, rivers, and bike paths offer plenty of spots to enjoy the clear air.
Uppsala’s location in Sweden, along with strong environmental policies, helps keep its air quality high. Even on busy days, the city’s air tends to stay well below the World Health Organization’s recommended limits.
One thing to watch out for is that Uppsala has a pretty high pollen count in Spring. This is something to consider if you’ve got hay fever or respiratory issues like asthma.
There are three stations in Uppsala that measure the air quality hour by hour, so you can always get up-to-date information about which pollutants are affecting the city the most.
3. Hobart, Australia (2.3 µg/m³)
If you ever visit Hobart, you’ll notice how fresh the air feels. The city often ranks high in global air quality lists, competing with places across the world.
Hobart sits on the island of Tasmania, far from big factories and major highways. This keeps pollution low and the air clean. Sea breezes help sweep away dust and particles, too.
You can see clear skies, even during winter. For people with asthma or allergies, that can make a big difference in daily life.
With an air quality level around 2.3 µg/m³, you’re breathing some of the cleanest urban air. It’s just another reason to enjoy time outdoors in Hobart.
2. Perth, Australia (1.5 µg/m³)
When you visit Perth, you’ll often notice how fresh the air feels. Perth is known for its clean skies and low air pollution levels. The city often ranks as one of the top places for good air quality in the world.
On most days, the air quality index in Perth is low, meaning it’s safe for being outdoors. You can go for a walk or play outside without worrying much about pollution.
The low PM2.5 level of about 1.5 µg/m³ shows the air is clear compared to many other cities. Wind from the Indian Ocean also helps keep the air clean.
Like in most cities in Australia, the only thing that can impact the air quality in Perth are bush fires, which are always more riffe in the summer months.
1. Zürich, Switzerland (0.4 µg/m³)
You’ll notice the fresh air as soon as you arrive in Zürich. The city has some of the cleanest air anywhere, with PM2.5 levels hovering around 0.4 µg/m³—way below what you’ll find in most big cities.
If you wander by Lake Zürich or stroll through the parks, you can just breathe deep and not stress about pollution. The city keeps its public transport clean and really cares about its green spaces, which honestly makes a huge difference.
Luckily for anyone in Zurich, these aren’t measures you’ll need to think about! Enjoy breathing in the freshest city air there is and spend as much time as you like outdoors.
Maybe you’ll want to try an open-air concert, hop on a bike, or just hang out outside for a while. Even on those warmer days—say, when it hits 26°C—the air stays clear. It’s hard not to appreciate how safe and easy it feels to get outdoors in Zürich.
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