5 Cleanest Countries in Europe

4. Denmark

Average Wastewater Treatment Level: 78

Average Mismanaged Solid Waste: 95.94

Annual Average PM2.5 Concentration (μg/m³): 8.6

Average Ranking: 11

Denmark is also a Scandinavian country situated in Northern Europe. The country is characterized by its long coastline. It is the 4th cleanest country in Europe, with an air quality index of 8.6μg/m³ and a developed solid and water waste management system.