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Colorado Sees Lowest Ozone Levels in 16 Years

10/11/2025

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Summary

Story summary

The Front Range of Colorado recorded its lowest ozone levels in 16 years this summer.
There were 23 days above federal air quality standards.
In 2025, 17 days surpassed the 2015 standard of 70 parts per billion.
The state has requested a downgrade to severe non-attainment.
The Regional Air Quality Council (RAQC) launched a study to better understand pollutants.

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Story summary

The Front Range of Colorado recorded its lowest ozone levels in 16 years this summer.
There were 23 days above federal air quality standards.
In 2025, 17 days surpassed the 2015 standard of 70 parts per billion.
The state has requested a downgrade to severe non-attainment.
The Regional Air Quality Council (RAQC) launched a study to better understand pollutants.