Fort Collins

View Southwest from the New Belgium Brewery

Live still image looking southwest from the New Belgium brewery
Responsive image New Belgium brewery overlay image

View Southwest from the Museum of Discovery

Live still image looking southwest from the Museum of Discovery
Responsive image Museum of Discovery overlay image

View South from the Soapstone Prairie Natural Area

Live still image looking south from the Soapstone Prairie Natural Area
Responsive image Soapstone Prairie overlay image

Show sites monitoring:

  • Ozone
  • PM
  • Camera

Air Quality Index (AQI)

  • Good
  • Moderate
  • Unhealthy for Sensitive Groups
  • Unhealthy
  • Very Unhealthy
  • Hazardous
  • AQI Unavailable
  • AQI not monitored

Citywide Air Quality Information

This page summarizes the city wide air quality and weather measured at six monitoring locations. Soapstone Prairie is not included in the summary due to its distance from the city. Since ozone and particulate matter are measured at more than one location, their displayed air quality conditions in the Data Summary are the highest (worst) of all the locations.

Air quality information measured at individual monitoring locations is available by selecting the Monitoring Sites tab above the image or selecting a location from the Monitoring Sites menu item.

This AQI summary may be slightly different than summaries provided by the EPA as it includes both regulatory and non-regulatory monitors to be more representative of local conditions.

Air quality good icon
Good (10+ miles)
No cautionary statement.
Air quality moderate icon
Moderate (5 - 10 miles)
Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air quality unhealthy for sensitive groups icon
Unhealthy for Sensitive Groups (3 - 5 miles)
Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors.
Air quality unhealthy icon
Unhealthy (1.5 - 3 miles)
Active children and adults, and people with lung disease, such as asthma, should avoid prolonged or heavy exertion outdoors. Everyone else, especially children, should reduce prolonged or heavy exertion outdoors.
Air quality very unhealthy icon
Very Unhealthy (less than 1.5 miles)
Active children and adults, and people with lung disease, such as asthma, should avoid all outdoor exertion. Everyone else, especially children, should avoid prolonged or heavy exertion outdoors.

Air quality good icon
Good  (1-hr avg PM2.5:   0 - 38 µg/m3      Nowcast PM2.5:   0 - 9.0 µg/m3      Nowcast PM10:   0 - 54 µg/m3)
No cautionary statement.
Air quality moderate icon
Moderate  (1-hr avg PM2.5:   39 - 88 µg/m3      Nowcast PM2.5:   9.1 - 35.4 µg/m3      Nowcast PM10:   55 - 154 µg/m3)
Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air quality unhealthy for sensitive groups icon
Unhealthy for Sensitive Groups  (1-hr avg PM2.5:   89 - 138 µg/m3      Nowcast PM2.5:   35.5 - 55.4 µg/m3      Nowcast PM10:   155 - 254 µg/m3)
Children, older adults, active people, and people with heart or lung disease (such as asthma) should reduce prolonged or heavy exertion outdoors.
Air quality unhealthy icon
Unhealthy   (1-hr avg PM2.5:   139 - 351 µg/m3      Nowcast PM2.5:   55.5 - 125.4 µg/m3      Nowcast PM10:   255 - 354 µg/m3)
Children, older adults, active people, and people with heart or lung disease (such as asthma) should avoid prolonged or heavy exertion outdoors. Everyone else should reduce prolonged or heavy exertion outdoors.
Air quality very unhealthy icon
Very Unhealthy  (1-hr avg PM2.5:   352 - 525 µg/m3      Nowcast PM2.5:   125.5 - 225.4 µg/m3      Nowcast PM10:   355 - 424 µg/m3)
Children, older adults, active people, and people with heart or lung disease (such as asthma) should avoid all outdoor exertion. Everyone else should avoid prolonged or heavy exertion outdoors.
Air quality hazardous icon
Hazardous  (1-hr avg PM2.5:   526+ µg/m3      Nowcast PM2.5:   225.5+ µg/m3      Nowcast PM10:   425+ µg/m3)
Everyone should avoid all physical activity outdoors. Children, older adults, and people with heart or lung disease (such as asthma) should remain indoors and keep activity levels low. Follow tips for keeping particle levels low indoors.
Learn more about the Air Quality Index »

Air quality good icon
Good (0 - 54 ppb)
No cautionary statement.
Air quality moderate icon
Moderate (55 - 70 ppb)
Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air quality unhealthy for sensitive groups icon
Unhealthy for Sensitive Groups (71 - 85 ppb)
Children, older adults, active people, and people with lung disease (such as asthma) should reduce prolonged or heavy exertion outdoors.
Air quality unhealthy icon
Unhealthy (86 - 105 ppb)
Children, older adults, active people, and people with lung disease (such as asthma) should avoid prolonged or heavy exertion outdoors. Everyone else should reduce prolonged or heavy exertion outdoors.
Air quality very unhealthy icon
Very Unhealthy (106+ ppb)
Children, older adults, active people, and people with lung disease (such as asthma) should avoid all outdoor exertion. Everyone else should avoid prolonged or heavy exertion outdoors.
Learn more about the Air Quality Index »

This AQI summary may be slightly different than summaries provided by the EPA as it includes both regulatory and non-regulatory monitors to be more representative of local conditions.