5 Greenest Small Towns in America

2. Telluride, Colorado

Average PM2.5 Concentration (2023): 2.0 µg/m³

Telluride is a small town in San Miguel County, Colorado. Its primary air pollutants are coarse and fine particulate matter. It is popular for skiing and other recreational activities in winter. In 2023, Telluride haD an average PM2.5 concentration of 2 micrograms per cubic meter. It is ranked 2nd on our list.