Boulder Reservoir is the nearest Colorado Department of Public Health and Environment regulatory air quality grade monitor.
Ozone days out of compliance indicate local air quality that is impacted by regional impacts. Longmont has also begun tracking local ozone data on Boulder AIR.
Number of Days without Data:
- 2016: No data prior to 8/16/2016
- 2017: Five days with no data
- 2018: Five days with no data
- 2019: Zero days with no data
- 2020: 28 days with no data
- 2021: One day with no data
- 2022: Two days with no data
- 2023: Five days with no data
- 2024: 18 days with no data