Outdoor Air Quality

Air pollution from natural and human impacts causes disease, reduces lifespan and causes emotional stress. San Miguel County residents and visitors' lives are enriched by clean air and clear alpine vistas. The environmental health department collaborates with Environmental Protection Agency, Colorado Department of Public Health and Environment, US Forest Service and other public health agencies to protect and improve air quality.

History of Air Quality in San Miguel County

The EPA began setting national ambient air quality standards for health in 1971. In 1986, air quality monitoring for PM10 (airborne particulate 10 microns and smaller) in Telluride exceeded the national air standard 17 times. Continued air sampling showed continuing exceedances in Telluride, and CDPHE designated Telluride a “non-attainment” area in 1990. 

Wildfires, high winds, oil & gas extraction, combustion engines, regional power plants, construction, and solid fuel heaters are just some of the sources of air pollution in San Miguel County. The population in the Town of Telluride is subjected to higher concentrations of pollutants due to natural ventilation inversions.

San Miguel County is currently in compliance with all State and Federal standards for air quality. The county reached attainment due to several efforts to minimize air pollutants. Additionally, several measures were made regionally to limit the amount of air pollution and maintain healthy air quality. 

  1. Air Monitoring
  2. Open Burn

San Miguel County Environmental Health Department operates two types of air pollution sampling devices, PM 2.5 and PM-10. Particulate matter (PM) is the term used for a mixture of solid particles and liquid droplets found in the air. The county’s PM monitoring tracks particulate matter that occur outdoors primarily from vehicles or burning of fuels such as wood, heating oil, coal, and natural sources such as wildfires. Exposure to fine particles can cause short and long term health effects, dependent on the duration and severity. 

Click here to view the Purple Air monitors for the San Miguel area. 

Click the links below for more information on outdoor air quality:

Click the links below for various smoke and wildfire resources: