June 4, 2026

IDEM Forecasts Statewide Air Quality Action Day for Thursday, June 4

INDIANAPOLIS – The Indiana Department of Environmental Management (IDEM) has forecast an Air Quality Action Day (AQAD) throughout Indiana for Thursday, June 4, 2026. 

Ozone levels are expected to be in the Unhealthy for Sensitive Groups range (Orange) throughout the state.

Today will bring warm, dry, and sunny conditions. Highs are expected to reach at least the mid 80's across the state. This is consistent with recent conditions, and ozone measurements have been increasing during this period as we have remained in the same air mass for multiple days. This is expected to result in measurements continuing to increase and in Unhealthy for Sensitive Groups range (Orange) for Ozone. 

Hoosiers can visit SmogWatch.IN.gov to:

• View air quality information for all Indiana counties, including a state map of affected counties;
• Learn more about Air Quality Action Days and recommended actions;
• Learn more about ozone and fine particulate matter; and
• Sign up for air quality alerts.

Air Quality Action Days are in effect from midnight to 11:59 p.m. (24-hours) on the specified date. Some municipalities have additional open burning restrictions on AQADs. For more information, go to idem.IN.gov/openburning/laws-and-rules. 

To learn more or sign up for air quality alerts, visit SmogWatch.IN.gov.

Note: IDEM forecasts are based, solely or in part, on data from air quality monitors located throughout the state. Air quality information for all Indiana counties can be found at SmogWatch.IN.gov. 

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About IDEM: IDEM ( idem.IN.gov ) implements federal and state regulations regarding the environment. Through compliance assistance, incentive programs and educational outreach, the agency encourages and aids businesses and citizens in protecting Hoosiers and our environment.