What is the Cleanest Country in the World? A 2025 Guide for Expats

Moving abroad involves many practical considerations. For many expats, cleanliness, air quality and a healthy environment are now as important as job opportunities or cost of living. Countries that invest in sustainability can offer a better quality of life, particularly for families, remote workers and retirees who want to enjoy safe outdoor spaces and clean public services.

This raises a common question. What is the cleanest country in the world in 2025 and which places offer the best environmental conditions for expats

To answer this, global researchers and policy experts analyse sustainability performance, pollution levels, waste management success and access to clean water. The results provide reliable rankings that help guide relocation decisions.

The most recognised framework is the Environmental Performance Index, or EPI. This index evaluates countries in a range of categories that relate directly to the health of local populations and ecosystems. These include:

• Air quality
• Drinking water standards
• Climate policies
• Public health outcomes
• Biodiversity and habitat protection
• Waste and chemical management

This data creates an internationally trusted list of the cleanest countries in the world. The rankings are updated regularly and include results for the top 50 cleanest countries in the world.

Finland is currently viewed as the cleanest country in the world. The country performs extremely well across all environmental measures. Over 75 percent of its landmass is forest and there is a strong cultural commitment to protecting nature. Pollution levels remain very low and access to safe drinking water is almost universal. Finnish cities also continue to improve public transport infrastructure and reduce carbon emissions.

For expats, Finland offers a clean-living environment, a high standard of public services and a lifestyle that encourages outdoor recreation. English is widely spoken in business and education. This creates minimal barriers for incoming professionals or families.

Many of the highest performing countries are in Europe. They have invested heavily in clean energy, sustainable development and efficient public transport.

These locations are well suited to expats who value health, safety and access to clean community spaces. They also tend to offer a high standard of education and healthcare.

The top twenty also include several popular relocation destinations.

11. Germany
12. United Kingdom
13. Japan
14. Canada
15. New Zealand
16. Australia
17. France
18. Spain
19. Singapore
20. Portugal

Beyond the top twenty, countries such as Estonia, Slovenia and Costa Rica are recognised for rapid environmental improvement and strong conservation policies. Some may rise further up the rankings in future years.

Even if a nation sits outside the top 10 cleanest countries in the world, specific cities can still offer excellent environmental conditions. Expats who prioritise clean air and sustainability should consider local data when evaluating potential homes.

Clean environments support healthier and more enjoyable lifestyles. Benefits include:

• Lower risk of respiratory illness
• Safe drinking water and healthier food quality
• More public green areas for recreation and fitness
• Reduced stress due to quieter, less polluted spaces
• Cleaner housing and urban infrastructure

Families particularly value destinations where children can grow up with safe play areas and low environmental risk.

Several emerging sustainability leaders deserve mention.

Singapore maintains one of the cleanest urban environments in the world through strong regulation and community engagement.
Costa Rica continues to protect biodiversity and forests that attract eco focused expats.
Slovenia has made significant recent progress supporting green industries and low impact tourism.

These countries are increasingly prominent in conversations about clean relocation choices.

Cleanliness varies between regions and cities within all nations. Prospective expats should evaluate:

• Local pollution statistics rather than national averages
• Access to clean tap water
• Transport options that reduce reliance on cars
• Waste collection and recycling services
• Environmental risk factors such as wildfires or floods

Healthcare planning is also essential. Even in the cleanest places, environmental factors can still affect health, particularly during seasonal events such as pollen spikes or cold weather pollution.

International health insurance from a specialist expat provider ensures that support remains available at every stage of relocation. This maintains peace of mind during the transition and offers flexibility if your work or family situation changes.

Finland currently answers the question of what is the cleanest country in the world. It offers pristine landscapes, low pollution and excellent environmental protection policies. Many European countries also feature among the top cleanest countries in the world and deliver strong quality of life for expats.

Relocation decisions are personal. However, countries that prioritise environmental health can provide long term benefits for wellbeing, financial security and family life. Clean air, clean water and sustainable infrastructure create a healthier environment for those building a life abroad.

Wherever you choose to move, it is important to consider the healthcare options that support your safety and comfort overseas. Expatriate Group offers international health insurance specifically designed for global living.