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Air Quality Forecasting

Current estimated air quality index and forecasts by region

Forecast discussion

A warm front will lift northward across the Indiana which may bring more storms to the northern part of the state. Winds will be southerly today, then easterly tomorrow. The warm front will linger there until Thursday.

September 8, 2020: Ozone forecast for Southern Indiana is Moderate with all other areas Good. PM2.5 forecast is for Central and Northern Indiana is Moderate with all other areas Good.

September 9, 2020: Ozone forecast for Southern and Central Indiana is Moderate with all other areas Good. PM2.5 forecast is for Central Indiana is Moderate with all other areas Good.

Region Current conditions
as of September 23, 2020 5:10 am EDT
Forecast for September 23, 2020
Estimated Air Quality Index Primary
Forecast Primary
Bloomington Not available No Forecast
Louisville Good - 0 SO2 No Forecast
Michigan City Not available No Forecast
South Bend Good - 16 NO2 No Forecast
Terre Haute Good - 1 SO2 No Forecast
Indianapolis-Carmel-Anderson Good - 23 NO2 No Forecast
Evansville-Henderson Good - 9 NO2 No Forecast
Fort Wayne Not available No Forecast
Gary Good - 26 NO2 No Forecast
Lafayette Not available No Forecast

Air Quality Index

About Air Quality

IDEM monitors level of ozone and particle pollution from stations around Indiana. Both of these are pollutants that, at high levels, may raise health concerns in some people.

Ground-level ozone is the main ingredient in smog. It is a colorless gas formed by the reaction of sunlight with vehicle emissions, gasoline fumes, solvent vapors, and power plant and industrial emissions. Ozone formation is most likely in hot, dry weather when the air is fairly still.

Particle pollution monitoring is now available on the web for select areas in Indiana. Particle pollution is made up of particles found in soot, dust, smoke, and fumes. The burning of coal, oil, diesel, and other fuels produces these particles. The particles are small enough to enter deep into the lungs and cause health problems.

Ozone and particle pollution have been linked to short-term health concerns, particularly among children, asthmatics, people with heart or lung disease, and older adults. The effects of these pollutants can be minimized by avoiding strenuous activity or exercise when levels are high. You can use the forecast for the following day to plan your activities during the summer months. More information on the health effects of air pollutants is available from AirNow.

What Can I Do?

PLEASE NOTE: This data has not been verified by the IDEM and may change. This is the most current data, but it is not official until it has been certified by our technical staff. Data is collected from IDEM ambient monitoring sites and may include data collected by other outside agencies. This data is updated hourly. All times shown are in local standard time unless otherwise indicated.