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Smog Watch Logo

Welcome to Indiana's Smog Watch Web site!

SmogWatch is an informational tool created by IDEM to share air quality forecasts for each day. SmogWatch provides daily information about ground-level ozone and particulate matter air quality forecasts, health information, and monitoring data for seven regions of Indiana.

Indiana experiences its highest levels of ground-level ozone from mid-May until mid-September. During this time, Smog Watch will provide daily health information and ozone forecasts. Particulate matter information and forecasts are available year-round.

To access the air quality forecast and health scale reading for your area, please click on the appropriate regional area on the map above or in the table below.. The forecasts are based on actual air quality readings and weather patterns analyzed by state and federal meteorologists. Symbols on the map represent the regional air quality forecast for today as follows:

Symbol Good Moderate Unhealthy for Sensitive Groups Unhealthy Very Unhealthy
Meaning Good Moderate Unhealthy for
Sensitive Groups
Unhealthy Very Unhealthy
AQI* Range 0-50 51-100 101-150 151-200 201-300

*Air Quality Index

RegionHealth LevelPrimary Pollutant
Eastcentral Good PM2.5
Northcentral Good PM2.5
Northeast Good PM2.5
Northwest Good PM2.5
Southeast Good PM2.5
Southwest Good PM2.5
Westcentral Good PM2.5

The primary pollutant is the pollutant that is forecast to have the highest potential health impact.

Indiana's air quality forecasts can also be accessed using the link below

U.S. EPA's AIRNOW Air Quality Forecast for Indiana