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AQI: Good (0 - 50) AQI: Moderate (51 - 100) AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy (151 - 200) AQI: Very Unhealthy (201 - 300) AQI: Hazardous(301 - 500) Action DayAction Day
Local Air Quality Resources
Forecast | MORPC's Air Quality Program | Today's AQI Data
State Air Quality Resources
American Lung Association (ALA) of Ohio
Ohio EPA - Division of Air Pollution Control (DAPC)
Ohio EPA - For More Information
Ohio EPA's AIROHIO web site
Ohio Environmental Protection Agency (EPA) is undergoing maintenance. Updates for the forecasts and current conditions are not available between midnight and 4 am EST.

Air Quality Forecast
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Air Quality Index (AQI)
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
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AQI - Pollutant Details
Particles (PM2.5)
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Forecast Discussion: Wednesday, August 20: Mostly sunny skies and warm afternoon temperatures will enhance ozone formation in central Ohio. In addition, west-southwesterly winds will transport regional pollutants into Columbus, and high relative humidity will enhance particle production. As a result, AQI levels will be low-Moderate. Thursday, August 21: Mostly cloudy skies will inhibit ozone formation, and scattered showers and thunderstorms will increase atmospheric mixing. However, light southwesterly winds will transport additional pollutants into central Ohio, and high relative humidity will continue to enhance particle production. Therefore, AQI levels will remain Moderate. Friday through Monday, partly sunny skies and warm temperatures will increase ozone formation, and a humid air mass will continue to enhance particle production in the Columbus area. These conditions, combined with pollutant carryover from day to day, will yield Moderate AQI levels on all four days.

Current Conditions
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