11. Costa Rica
Costa Rica is one of the countries with the cleanest tap water in the world for there is almost zero evidence of pollution in the country and they only utilize a high standard in maintaining their advanced filtering system. There are less factories and industries here that could be a threat to fire up water pollution in the area. Living in a pollution free country like Costa Rica has its own little perks (besides of the country being popularly known across the world) such as living a longer and simpler life.
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