IDEM forecasts Air Quality Action Day in Northern Regions for Tuesday

Monday, August 4, 2025 at 12:27 PM

By Staff report

The Indiana Department of Environmental Management (IDEM) has forecast an air quality action day (AQAD) across the northern section of the state for Tuesday, August 5.

Fine particulate matter levels are expected to be in the Unhealthy for Sensitive Groups range (Orange) in the following areas:

North Central Indiana, including the cities of: Elkhart, Goshen, Knox, Logansport, Plymouth, Peru, South Bend, Warsaw, Winamac and all other cities within the area.
Northwest Indiana, including the cities of: Crown Point, Gary, Hammond, Kentland, LaPorte, Michigan City, Portage, Rensselaer, Valparaiso and all other cities within the area.
Northeast Indiana, including the cities of: Angola, Auburn, Decatur, Fort Wayne, Hartford, Huntington City, LaGrange, Marion, Portland, Wabash and all other cities within the area.

Canadian wildfire smoke circulating in the region will be pulled into northern Indiana Tuesday. Fine Particulate monitor readings will increase as the plume of smoke moves across the region.

IDEM forecasted Air Quality Action Days indicate anticipated higher levels of ground-level ozone and fine particulate matter only. Other factors may affect overall air quality.

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.

Note: IDEM forecasts are based, solely or in part, on data from air quality monitors located throughout the state. IDEM encourages residents of counties within or bordering the affected region(s) to heed the forecast. Air quality information for all Indiana counties can be found at SmogWatch.IN.gov.