Elevated Ozone Air Quality Alert
Key Questions
What warning has the Maine DEP issued for May 19?
The Maine DEP warns that ground-level ozone concentrations are expected to reach the Unhealthy for Sensitive Groups level on May 19. This alert highlights potential respiratory irritation risks for vulnerable populations.
Which areas in Maine could see impacts from the elevated ozone?
Moderate inland impacts are possible in Aroostook. The alert focuses on sensitive groups across the state with varying levels of exposure.
Who is most at risk from the unhealthy ozone levels?
Sensitive groups such as children, the elderly, and individuals with respiratory conditions face higher risks. Exposure may cause irritation and other health effects during the alert period.
May 19: Maine DEP warns of unhealthy ozone levels for sensitive groups, with moderate inland impacts possible in Aroostook including respiratory irritation risks.
Sources (2)
Updated May 20, 2026