The Indiana Department of Environmental Management (IDEM) has forecasted an Air Quality Action Day (AQAD) for Saturday, May 18, 2024, for North Central and Northwest Indiana.

Ozone 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.

High temperatures are expected to reach the 80’s on Saturday which is well above seasonal averages for this time of the year – which combined with mostly sunny skies, low humidity and a lake breeze, may lead to ozone levels increasing to unhealthy for sensitive groups. IDEM forecasted Air Quality Action Days indicate anticipated higher levels of ground-level ozone only. Other factors may affect overall air quality.

Hoosiers can visit SmogWatch.IN.gov to:

Air Quality Action Days generally occur when weather conditions such as light winds, hot and dry air, stagnant conditions, wildfire smoke, industrial fires or lower atmospheric inversions trap pollutants close to the ground. 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.

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, see idem.IN.gov/openburning/laws-and-rules.

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.