Weather & Environment

Air Quality Alert Issued for Southwest Ohio Through Thursday Night

Southwest Ohio residents face unhealthy ozone levels through Thursday night as multiple agencies urge carpooling and evening lawn care.

David Kowalski
David KowalskiStaff Reporter
Published June 3, 2026, 7:45 PM GMT+2
Air Quality Alert Issued for Southwest Ohio Through Thursday Night
Air Quality Alert Issued for Southwest Ohio Through Thursday Night

COLUMBUS, OHIO β€” Multiple air quality agencies issued alerts Tuesday afternoon warning residents across southwest Ohio that ozone levels may reach unhealthy standards from midnight tonight through midnight Thursday night.

The Southwest Ohio Air Quality Agency issued an advisory for Butler, Clermont, Hamilton and Warren counties in Ohio, along with Boone, Campbell and Kenton counties in Kentucky and Dearborn County in Indiana. The alert was issued at 3:20 p.m. and updated at 3:37 p.m. Tuesday by the National Weather Service Wilmington office.

The Miami Valley Regional Planning Commission and Regional Air Pollution Control Agency also issued a separate alert for Clark, Darke, Greene, Miami, Montgomery, Preble, and Shelby counties in the Miami Valley region for the same time period.

Recommended Actions to Reduce Ozone

Both agencies recommend steps residents can take to help reduce ozone pollution during the alert period. Officials advise carpooling, biking, walking or taking public transportation instead of driving alone whenever possible.

Vehicle-related recommendations include refueling after 8 p.m. and avoiding idling, as exhaust contributes to air pollution. For lawn care, residents should mow in the evening hours and avoid using gas-powered lawn equipment during daytime hours.

Health and Environmental Impact

Ground-level ozone forms when pollutants from vehicles, industrial facilities and other sources react with sunlight and heat. High ozone levels can cause breathing difficulties, particularly for children, older adults and people with respiratory conditions like asthma.

The alerts cover a significant portion of Ohio’s population centers, including the Cincinnati metropolitan area and surrounding counties. The affected region extends into northern Kentucky and southeastern Indiana, encompassing both urban and suburban communities.

Additional Resources

Residents seeking more information about air quality conditions and additional actions they can take are directed to visit miamivalleyair.org or call 937-223-6323 for the Miami Valley region. Those in the Southwest Ohio Air Quality Agency coverage area can visit www.southwestohioair.org/local_air_quality for local air quality information.

The National Weather Service continues to monitor atmospheric conditions that contribute to ozone formation. Hot, sunny weather with light winds typically creates the most favorable conditions for elevated ozone levels during summer months.

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