Statewide advisory issued for July 17
The Ohio Environmental Protection Agency issued a statewide air quality advisory for Friday, July 17, warning residents that smoke carried from wildfires in Canada will drive particulate levels and ozone into harmful ranges across much of the state.
For central Ohio, the Mid-Ohio Regional Planning Commission (MORPC) also issued an air quality alert covering Franklin, Delaware, Fairfield and Licking counties that will remain in effect throughout the day. MORPC forecast the Air Quality Index (AQI) in the region between 151 and 200, a range classified as "unhealthy" for all residents, and said particulate matter concentrations could reach 179.
Why the risk is elevated
Officials said smoke transported from Canadian wildfires, combined with local weather patterns, will keep pollutants close to the surface. MORPC described the expected wind pattern and morning atmospheric conditions as factors that will trap and recirculate smoke across central Ohio.
“Light winds will recirculate dense smoke across central Ohio,”
What the advisory means and recommended actions
Air quality alerts are issued when pollutant concentrations make outdoor activity unsafe for segments of the population or the public at large. MORPC and state officials urged residents to limit exposure and take steps to reduce local pollution that worsens ozone formation during heat.
- Expect AQI values in the Unhealthy (151–200) range in central Ohio on July 17.
- People with heart or lung disease, older adults and children should avoid prolonged or heavy outdoor exertion.
- Consider using public transit, carpooling, biking or walking to reduce local emissions that contribute to ozone.
- Delay fueling vehicles until after 8 p.m., avoid idling, and if possible, postpone mowing and other gas-powered yard work until evening.
Heat and timing
High temperatures in the 90s are expected across the Columbus region Friday, which can accelerate ozone formation when pollutants are present. MORPC noted pollutant carryover from previous days and a morning inversion that will tend to keep smoke near the surface.
| Area | Forecast AQI / Category |
|---|---|
| Central Ohio (Franklin, Delaware, Fairfield, Licking) | 151–200 (Unhealthy) |
Context and comparison
This advisory marks the second statewide alert in as many days from the Ohio EPA and the fourth straight daily air quality alert issued by MORPC for central Ohio. MORPC said the last time it issued alerts four days in a row was Aug. 23–26, 2012.
Residents should monitor local AQI readings through official sources and take precautions if symptoms like eye or throat irritation, coughing, or shortness of breath develop. Officials will update advisories as conditions change.
— Derek Mansfield, Ohio Correspondent
