Current 8-Hour Ozone Summary

Ozone Summary through May 26th, 2025

8-hour Ozone Summary is based on 8-hour averages of raw 1-hour ozone data from the Colorado Department of Public Health and Environment (CDPHE) through EPA AirNow and consistent with Data Reporting and Handling Conventions outlined in 40 CFR Part 50 – Appendix P.

To view historic ozone summaries click here.