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IDEM issues Statewide Air Quality Action Day June 30

The Indiana Department of Environmental Management (IDEM) has issued an Air Quality Action Day (AQAD) and is forecasting high ozone levels for June 30 in the following regions: 

• Central Indiana: Marion, Bartholomew, Boone, Brown, Delaware, Hamilton, Hendricks, Howard, Madison, Shelby

• North Central Indiana: St. Joseph, Elkhart

• Northeast Indiana: Allen, Huntington, Wabash

• Northwest Indiana: Lake, Porter, LaPorte

• Southeast Indiana: Clark, Floyd

• Southwest Indiana: Daviess, Dubois, Gibson, Greene, Knox, Perry, Pike, Posey, Spencer, Vanderburgh, Warrick

• West Central Indiana: Vigo, Carroll, Tippecanoe

All the counties referenced in the regions above are equipped with ozone air quality monitors, but all counties with an AQAD region should heed the forecast.

Air quality information for all Indiana counties can be found at

IDEM encourages everyone to help reduce ozone by making changes to their daily habits, including:

• Drive less; carpool, use public transportation, walk, bike, or work from home when possible.

• Combine errands into one trip

• Avoid refueling you vehicle or using gasoline-powered lawn equipment after 7 p.m.

• Keep your engine tuned, and don't let your engine idle

• Conserve energy by turning off lights and setting the thermostat to 75 degrees or above

AQAD are in effect from midnight to 11:59 p.m. on the specified date. Anyone sensitive to changed in air quality may be affected when ozone levels are high. Children, the elderly, and anyone with heart or lung conditions should reduce or avoid exertion and heavy work outdoors.

Ground-level ozone is formed when sunlight and hot weather combine with vehicle exhaust, factory emissions, and gasoline vapors. Ozone is the upper atmosphere that blocks ultraviolet radiation, but ozone near the ground is a lung irritant that can cause coughing and breathing difficulties for sensitive populations.

IDEM examines weather patterns and current ozone readings to make daily air quality forecass. AQAD generally occur when weather conditions such as light winds, hot and dry air, stagnant conditions, and lower atmospheric inversions trap pollutants close to the ground.

To learn more about ozone or to sign up for air quality alerts, visit