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 | |
 |
 |
 |
 |
|---|---|---|---|---|---|
| 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
| Region | Health Level | Primary 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.
Sources of Additional Information:
- What is Ozone?
- Map of Ozone Monitors
- 8-hour Ozone Status
- 8-hour Ozone Critical Values
- Ozone Season Summary Report
- Map of Indiana Ozone Nonattainment Areas
- What are Fine Particles?
- Map of Fine Particle Monitors
- Indianapolis Fine Particles Data
- Fine Particles Status
- Map of Indiana Fine Particle Nonattainment Areas
- What You Can Do
- SmogWatch Forecasting
- Additional Links
Educational Materials
Ozone Information BrochureParticulate Matter Information Brochure
SmogWatch Brochure
SmogWatch E-mail Notices
Sign up to receive e-mails for ozone and particulate matter forecasts and notices of Air Quality Action Days click on the map in the region of the state you want to receive the notice about and scroll down to the heading "Sources of Additional Information." Click on E-mail Notice and then fill in the information requested. Please note that if you would like to receive notices for multiple regions you must sign up for each region individually.
Are you going to be away from your computer?
Now you don't have to have a computer to access the ozone forecast for your region. Smog Watch forecasts are only a phone call away. Call
1-800-631-2871 or (317) 233-2318
to access the Smog Watch line. Forecast and health information are updated by 2 p.m. daily.