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Air Quality Forecasting

Current estimated air quality index and forecasts by region

Forecast discussion

Hot conditions are ahead this afternoon as very warm air remains over the area ahead of a cold front that is expected to move across the area Saturday. A cooler and dry period is ahead for much of the upcoming week as a large high-pressure area settles over the Midwest. Once this occurs, we will be in a northerly flow aloft with northwest winds on tap for several days as a ridge develops in the southwest and allows below average temperatures starting Sunday. Tomorrow temperatures will make it to the upper 80’s but with the frontal boundary passing over the area with the risk of heavy rain. Winds will be light and out of the northwest. Sunday and Monday temperatures will be in the low 80’s with RH values under 40% but with the clean airmass and steady winds out of the northwest.

June 12-14, 2021: Ozone forecasts are Moderate.

June 12-14, 2021: PM2.5 forecasts are Good.

Forecasts updated June 11, 2021 10:11 am EDT.

Region Current conditions
as of June 12, 2021 9:10 am EDT
Forecast for June 12, 2021 Forecast for June 13, 2021 Forecast for June 14, 2021
Estimated Air Quality Index Primary
Pollutant
Forecast Primary
Pollutant
Forecast Primary
Pollutant
Forecast Primary
Pollutant
Bloomington Good - 16 PM2.5 (Lcl) Moderate O3 Moderate O3 Moderate O3
Louisville Good - 39 PM2.5 (Lcl) Moderate O3 Moderate O3 Moderate O3
Michigan City Not available Moderate O3 Moderate O3 Moderate O3
South Bend Good - 39 PM2.5 (Lcl) Moderate O3 Moderate O3 Moderate O3
Terre Haute Good - 35 PM2.5 (Lcl) Moderate O3 Moderate O3 Moderate O3
Indianapolis-Carmel-Anderson Moderate - 64 PM2.5 (Lcl) Moderate O3 Moderate O3 Moderate O3
Evansville-Henderson Good - 40 PM2.5 (Lcl) Moderate O3 Moderate O3 Moderate O3
Fort Wayne Good - 41 PM2.5 (Lcl) Moderate O3 Moderate O3 Moderate O3
Gary Moderate - 59 PM2.5 (Lcl) Moderate O3 Moderate O3 Moderate O3
Lafayette Good - 30 PM2.5 (Lcl) Moderate O3 Moderate O3 Moderate O3

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.