Data source: National Weather Service (NWS) Last verified: July 19, 2026

Air Quality

Air Quality Alert (ADVISORY) - expires July 19, 2026 at 10:15 AM EDT

Areas affected: Marion

Air Quality Alert issued July 18 at 10:06PM EDT by NWS Indianapolis IN

The officials at the Office of Sustainability for the City of Indianapolis have called for a Knozone Action Day, IN EFFECT UNTIL MIDNIGHT EDT MONDAY NIGHT.

A Knozone Action day means that a combination of high temperatures, light winds, and other factors are expected to produce conditions where high levels of ozone emissions may exceed federally mandated standards.

Fine particulate levels are expected to be in the Unhealthy for Sensitive Groups range. Active children and adults, and people with respiratory disease, such as asthma should limit prolonged outdoor exposure.

Here are some recommended actions that the public can take:

• Walk, bike, carpool or use public transportation.
• Avoid using the drive-through and combine errands into one trip.
• Avoid refueling your vehicle or using gasoline-powered lawn equipment until after 7pm.
• Turn off your engine when idling for more than 30 seconds.
• Conserve energy by turning off lights or setting the air conditioner to 75 degrees or above.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

Source: NWS Indianapolis IN

Air Quality Alert (ADVISORY) - expires July 19, 2026 at 10:15 AM EDT

Areas affected: Carroll; Warren; Tippecanoe; Clinton; Howard; Fountain; Montgomery; Boone; Tipton; Hamilton; Madison; Delaware; Randolph; Vermillion; Parke; Putnam; Hendricks; Hancock; Henry; Vigo; Clay; Owen; Morgan; Johnson; Shelby; Rush; Sullivan; Monroe; Brown; Bartholomew; Decatur

Air Quality Alert issued July 18 at 10:06PM EDT by NWS Indianapolis IN

The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day, IN EFFECT FROM MIDNIGHT TONIGHT UNTIL MIDNIGHT EDT MONDAY NIGHT.

An Air Quality Action Day for PM 2.5 has been issued. Fine particulate levels are expected to be in the Unhealthy for Sensitive Groups range. Active children and adults, and people with respiratory disease, such as asthma should limit prolonged outdoor exposure.

Here are some recommended actions that the public can take:

• Due to observed and forecasted high concentrations of PM 2.5 values in the area, recommendations are for the public to avoid or limit outdoor exposure to wildfire smoke, reduce or avoid exertion or heavy work outdoors, and keep windows and doors closed as much as possible.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

Source: NWS Indianapolis IN

Air Quality Alert (ADVISORY) - expires July 21, 2026 at 12:00 AM EDT

Areas affected: Carroll; Warren; Tippecanoe; Clinton; Howard; Fountain; Montgomery; Boone; Tipton; Hamilton; Madison; Delaware; Randolph; Vermillion; Parke; Putnam; Hendricks; Hancock; Henry; Vigo; Clay; Owen; Morgan; Johnson; Shelby; Rush; Sullivan; Monroe; Brown; Bartholomew; Decatur

Air Quality Alert issued July 18 at 2:19PM EDT by NWS Indianapolis IN

The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day, IN EFFECT FROM MIDNIGHT TONIGHT TO MIDNIGHT EDT MONDAY NIGHT.

An Air Quality Action Day for PM 2.5 has been issued. Fine particulate levels are expected to be in the Unhealthy for Sensitive Groups range. Active children and adults, and people with respiratory disease, such as asthma should limit prolonged outdoor exposure.

Here are some recommended actions that the public can take:

• Due to observed and forecasted high concentrations of PM 2.5 values in the area, recommendations are for the public to avoid or limit outdoor exposure to wildfire smoke, reduce or avoid exertion or heavy work outdoors, and keep windows and doors closed as much as possible.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

Source: NWS Indianapolis IN

Air Quality Alert (ADVISORY) - expires July 21, 2026 at 12:00 AM EDT

Areas affected: Marion

Air Quality Alert issued July 18 at 2:19PM EDT by NWS Indianapolis IN

The officials at the Office of Sustainability for the City of Indianapolis have called for a Knozone Action Day, IN EFFECT FROM MIDNIGHT TONIGHT TO MIDNIGHT EDT MONDAY NIGHT.

A Knozone Action day means that a combination of high temperatures, light winds, and other factors are expected to produce conditions where high levels of ozone emissions may exceed federally mandated standards.

Fine particulate levels are expected to be in the Unhealthy for Sensitive Groups range. Active children and adults, and people with respiratory disease, such as asthma should limit prolonged outdoor exposure.

Here are some recommended actions that the public can take:

• Walk, bike, carpool or use public transportation.
• Avoid using the drive-through and combine errands into one trip.
• Avoid refueling your vehicle or using gasoline-powered lawn equipment until after 7pm.
• Turn off your engine when idling for more than 30 seconds.
• Conserve energy by turning off lights or setting the air conditioner to 75 degrees or above.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

Source: NWS Indianapolis IN

Air Quality Alert (ADVISORY) - expires July 20, 2026 at 12:00 AM EDT

Areas affected: Elkhart; Lagrange; Steuben; Noble; De Kalb; Starke; Pulaski; Marshall; Fulton; Whitley; Allen; White; Cass; Miami; Wabash; Huntington; Wells; Adams; Grant; Blackford; Jay; Northern La Porte; Eastern St. Joseph; Northern Kosciusko; Southern La Porte; Western St. Joseph; Southern Kosciusko

Air Quality Alert issued July 18 at 1:56PM EDT by NWS Northern Indiana

The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day, in effect through Sunday July 19.

An Air Quality Action Day for Smoke has been issued. Smoke levels are expected to be in the Unhealthy for Sensitive Groups range. Active children and adults, and people with respiratory disease, such as asthma should limit prolonged outdoor exposure.

Due to the observed and forecasted high concentrations of PM 2.5 readings values in the area, recommendations are for the public to avoid or limite outdoor exposure to wildfire smoke, reduce or avoid exertion or heavy work outdoors and keep windows and doors closed as much as possible.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

Source: NWS Northern Indiana

Air Quality Alert (ADVISORY) - expires July 20, 2026 at 1:00 AM EDT

Areas affected: Benton

Air Quality Alert issued July 18 at 12:31PM CDT by NWS Chicago IL

The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day for Sunday and Monday.

An Air Quality Action Day for smoke has been issued. Smoke levels are expected to be in the Unhealthy for Sensitive Groups range. Active children and adults, and people with respiratory disease, such as asthma should limit prolonged outdoor exposure.

Due to observed and forecasted high concentrations of PM2.5 readings in the area, recommendations are for the public to avoid or limit outdoor exposure to wildfire smoke, reduce or avoid exertion or heavy work outdoors and keep windows and doors closed as much as possible.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

Source: NWS Chicago IL

Air Quality Alert (ADVISORY) - expires July 20, 2026 at 1:00 AM EDT

Areas affected: Lake; Porter; Newton; Jasper

Air Quality Alert issued July 18 at 12:31PM CDT by NWS Chicago IL

The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day, in effect until midnight CDT Monday night.

An Air Quality Action Day for ozone and PM 2.5 has been issued. A combination of fine particulate and ozone levels are expected to be in the Unhealthy for Sensitive Groups range. Active children and adults, and people with respiratory disease, such as asthma should limit prolonged outdoor exposure.

Due to observed and forecasted high concentrations of PM2.5 readings in the area, recommendations are for the public to avoid or limit outdoor exposure to wildfire smoke, reduce or avoid exertion or heavy work outdoors and keep windows and doors closed as much as possible.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

Source: NWS Chicago IL

Air Quality Alert (ADVISORY) - expires July 21, 2026 at 12:15 AM EDT

Areas affected: Wayne; Fayette; Union; Franklin

Air Quality Alert issued July 18 at 1:03PM EDT by NWS Wilmington OH

The Indiana Department of Environmental Management has declared an Air Action Day, from midnight tonight to midnight EDT Monday night.

Due to observed and forecasted high concentrations of PM2.5 values in the area, recommendations are for the public to avoid or limit outdoor exposure to wildfire smoke, reduce or avoid exertion or heavy work outdoors and keep windows and doors closed as much as possible.

Fine particulate levels are expected to be in the Unhealthy for Sensitive Groups range. Active children and adults, and people with respiratory disease, such as asthma should limit prolonged outdoor exposure.

For additional actions and information, please visit the IDEM Smog page at: https://www.in.gov/idem/airmonitoring/smogwatch/

Source: NWS Wilmington OH

Air Quality Alert (ADVISORY) - expires July 19, 2026 at 1:15 AM EDT

Areas affected: Benton

Air Quality Alert issued July 18 at 12:13AM CDT by NWS Chicago IL

The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day for Sunday and Monday.

An Air Quality Action Day for smoke has been issued. Smoke levels are expected to be in the Unhealthy for Sensitive Groups range. Active children and adults, and people with respiratory disease, such as asthma should limit prolonged outdoor exposure.

Due to observed and forecasted high concentrations of PM2.5 readings in the area, recommendations are for the public to avoid or limit outdoor exposure to wildfire smoke, reduce or avoid exertion or heavy work outdoors and keep windows and doors closed as much as possible.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

Source: NWS Chicago IL

Air Quality Alert (ADVISORY) - expires July 19, 2026 at 1:15 AM EDT

Areas affected: Lake; Porter; Newton; Jasper

Air Quality Alert issued July 18 at 12:13AM CDT by NWS Chicago IL

The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day, in effect until midnight CDT Monday night.

An Air Quality Action Day for ozone and PM 2.5 has been issued. A combination of fine particulate and ozone levels are expected to be in the Unhealthy for Sensitive Groups range. Active children and adults, and people with respiratory disease, such as asthma should limit prolonged outdoor exposure.

Due to observed and forecasted high concentrations of PM2.5 readings in the area, recommendations are for the public to avoid or limit outdoor exposure to wildfire smoke, reduce or avoid exertion or heavy work outdoors and keep windows and doors closed as much as possible.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

Source: NWS Chicago IL

Air Quality Alert (ADVISORY) - expires July 19, 2026 at 12:00 AM EDT

Areas affected: White

Air Quality Alert issued July 17 at 9:33PM EDT by NWS Northern Indiana

The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day, in effect from Friday through Monday.

Heavy smoke is lingering for the northern half of Indiana currently divided by a stationary front. The front will lift north later Friday providing a brief break in levels before a system late Saturday will bring another round of smoke. High pressure in place Sunday and Monday will recirculate the smoke over most of the state with the primary concern remaining the northern half of Indiana. This smoke, in addition to the other meteorological factors such as light winds and predicted flow from the north, will produce high PM2.5 readings. This will produce high PM2.5 readings into the Unhealthy for Sensitive Groups (USG) for West Central Indiana, which includes White County.

Due to observed and forecasted high concentrations of PM2.5 readings in the area, recommendations are for the pubic to avoid or limit outdoor exposure to wildfire smoke, reduce or avoid exertion or heavy work outdoors and keep windows and doors closed as much as possible.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

Source: NWS Northern Indiana

Air Quality Alert (ADVISORY) - expires July 19, 2026 at 12:00 AM EDT

Areas affected: Northern La Porte; Southern La Porte

Air Quality Alert issued July 17 at 9:33PM EDT by NWS Northern Indiana

The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day, in effect from Friday through Monday.

Heavy smoke is lingering for the northern half of Indiana currently divided by a stationary front. The front will lift north later Friday providing a brief break in levels before a system late Saturday will bring another round of smoke. High pressure in place Sunday and Monday will recirculate the smoke over most of the state with the primary concern remaining the northern half of Indiana. This smoke, in addition to the other meteorological factors such as light winds and predicted flow from the north, will produce high PM2.5 readings.

• Friday: Very Unhealthy conditions for Northwest Indiana.
• Saturday: Unhealthy for Sensitive Groups (USG) conditions for Northwest Indiana.
• Sunday: Unhealthy conditions for Northwest Indiana.
• Monday: Unhealthy conditions for Northwest Indiana

Due to observed and forecasted high concentrations of PM2.5 readings in the area, recommendations are for the pubic to avoid or limit outdoor exposure to wildfire smoke, reduce or avoid exertion or heavy work outdoors and keep windows and doors closed as much as possible.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

Source: NWS Northern Indiana

Air Quality Alert (ADVISORY) - expires July 19, 2026 at 12:00 AM EDT

Areas affected: Elkhart; Lagrange; Steuben; Noble; De Kalb; Starke; Pulaski; Marshall; Fulton; Whitley; Allen; Cass; Miami; Wabash; Huntington; Wells; Adams; Grant; Blackford; Jay; Eastern St. Joseph; Northern Kosciusko; Western St. Joseph; Southern Kosciusko

Air Quality Alert issued July 17 at 9:33PM EDT by NWS Northern Indiana

The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day, in effect from Friday through Monday.

Heavy smoke is lingering for the northern half of Indiana currently divided by a stationary front. The front will lift north later Friday providing a brief break in levels before a system late Saturday will bring another round of smoke. High pressure in place Sunday and Monday will recirculate the smoke over most of the state with the primary concern remaining the northern half of Indiana. This smoke, in addition to the other meteorological factors such as light winds and predicted flow from the north, will produce high PM2.5 readings.

• Friday: Very Unhealthy conditions for Northeast and North Central Indiana.
• Saturday: Unhealthy for Sensitive Groups (USG) conditions for Northeast and North Central Indiana.
• Sunday: Unhealthy conditions for Northeast and North Central Indiana.
• Monday: Unhealthy conditions for Northeast and North Central Indiana.

Due to observed and forecasted high concentrations of PM2.5 readings in the area, recommendations are for the pubic to avoid or limit outdoor exposure to wildfire smoke, reduce or avoid exertion or heavy work outdoors and keep windows and doors closed as much as possible.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

Source: NWS Northern Indiana

Air Quality Alert (ADVISORY) - expires July 19, 2026 at 12:00 AM EDT

Areas affected: Elkhart; Lagrange; Steuben; Noble; De Kalb; Starke; Pulaski; Marshall; Fulton; Whitley; Allen; Cass; Miami; Wabash; Huntington; Wells; Adams; Grant; Blackford; Jay; Eastern St. Joseph; Northern Kosciusko; Western St. Joseph; Southern Kosciusko

Air Quality Alert issued July 17 at 12:37PM EDT by NWS Northern Indiana

The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day, in effect from Friday through Monday.

Heavy smoke is lingering for the northern half of Indiana currently divided by a stationary front. The front will lift north later Friday providing a brief break in levels before a system late Saturday will bring another round of smoke. High pressure in place Sunday and Monday will recirculate the smoke over most of the state with the primary concern remaining the northern half of Indiana. This smoke, in addition to the other meteorological factors such as light winds and predicted flow from the north, will produce high PM2.5 readings.

• Friday: Very Unhealthy conditions for Northeast and North Central Indiana.
• Saturday: Unhealthy for Sensitive Groups (USG) conditions for Northeast and North Central Indiana.
• Sunday: Unhealthy conditions for Northeast and North Central Indiana.
• Monday: Unhealthy conditions for Northeast and North Central Indiana.

Here are some recommended actions that the public can take:

• Walk, bike, carpool or use public transportation.
• Avoid using the drive-through and combine errands into one trip.
• Avoid refueling your vehicle or using gasoline-powered lawn equipment until after 7pm.
• Turn off your engine when idling for more than 30 seconds.
• Conserve energy by turning off lights or setting the air conditioner to 75 degrees or above.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

Source: NWS Northern Indiana

Air Quality Alert (ADVISORY) - expires July 19, 2026 at 12:00 AM EDT

Areas affected: Northern La Porte; Southern La Porte

Air Quality Alert issued July 17 at 12:37PM EDT by NWS Northern Indiana

The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day, in effect from Friday through Monday.

Heavy smoke is lingering for the northern half of Indiana currently divided by a stationary front. The front will lift north later Friday providing a brief break in levels before a system late Saturday will bring another round of smoke. High pressure in place Sunday and Monday will recirculate the smoke over most of the state with the primary concern remaining the northern half of Indiana. This smoke, in addition to the other meteorological factors such as light winds and predicted flow from the north, will produce high PM2.5 readings.

• Friday: Very Unhealthy conditions for Northwest Indiana.
• Saturday: Unhealthy for Sensitive Groups (USG) conditions for Northwest Indiana.
• Sunday: Unhealthy conditions for Northwest Indiana.
• Monday: Unhealthy conditions for Northwest Indiana

Here are some recommended actions that the public can take:

• Walk, bike, carpool or use public transportation.
• Avoid using the drive-through and combine errands into one trip.
• Avoid refueling your vehicle or using gasoline-powered lawn equipment until after 7pm.
• Turn off your engine when idling for more than 30 seconds.
• Conserve energy by turning off lights or setting the air conditioner to 75 degrees or above.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

Source: NWS Northern Indiana

Air Quality Alert (ADVISORY) - expires July 19, 2026 at 12:00 AM EDT

Areas affected: White

Air Quality Alert issued July 17 at 12:37PM EDT by NWS Northern Indiana

The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day, in effect from Friday through Monday.

Heavy smoke is lingering for the northern half of Indiana currently divided by a stationary front. The front will lift north later Friday providing a brief break in levels before a system late Saturday will bring another round of smoke. High pressure in place Sunday and Monday will recirculate the smoke over most of the state with the primary concern remaining the northern half of Indiana. This smoke, in addition to the other meteorological factors such as light winds and predicted flow from the north, will produce high PM2.5 readings. This will produce high PM2.5 readings into the Unhealthy for Sensitive Groups (USG) for West Central Indiana, which includes White County.

Here are some recommended actions that the public can take:

• Walk, bike, carpool or use public transportation.
• Avoid using the drive-through and combine errands into one trip.
• Avoid refueling your vehicle or using gasoline-powered lawn equipment until after 7pm.
• Turn off your engine when idling for more than 30 seconds.
• Conserve energy by turning off lights or setting the air conditioner to 75 degrees or above.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

Source: NWS Northern Indiana

Source

Alert data provided by the National Weather Service (NWS). This page shows active alerts only and is refreshed daily. For real-time updates, visit weather.gov.