Ozone (O3) Data Map

Ground-level O3, or photochemical smog, is not emitted into the atmosphere as ozone, but rather is formed by the reactions of other pollutants. The primary pollutants entering into this reaction, volatile organic compounds (VOCs) and oxides of nitrogen, create ozone in the presence of sunlight. Ozone is a strong irritant of the upper respiratory system and also causes damage to crops.

IDEM operates 43 continuous O3 monitoring sites that are polled hourly in order to obtain the most current information. This continuous data is available interactively through the map and table below.

Ozone MonitorsAlbany Albany Avon Avon Boonville Boonville Bristol Bristol Brownstown Brownstown Cassopolis Cassopolis Charlestown St. Park Charlestown St. Park Dayville Dayville Emporia Emporia Evansville - Buena Vista Evansville - Buena Vista Fairland Fairland Flora Flora Fortville Fortville Ft Wayne - Beacon St. Ft Wayne - Beacon St. Gary - IITRI Gary - IITRI Granger - Beckley St. Granger - Beckley St. Hammond - 141st St. Hammond - 141st St. Helmsburg Helmsburg Hope Hope Inglefield Inglefield Indpls - E. 16th St. Indpls - E. 16th St. Indpls - Ft. Harrison Indpls - Ft. Harrison Indpls - Harding St. Indpls - Harding St. Indpls - I-70 E Indpls - I-70 E Indpls - Washington Park Indpls - Washington Park LaPorte - E. Lincolnway LaPorte - E. Lincolnway Leo Leo Leopold Leopold Lynnville Lynnville Michigan City - 4th St. Michigan City - 4th St. Monrovia Monrovia New Albany New Albany Noblesville - 191st St. Noblesville - 191st St. Ogden Dunes Ogden Dunes Plummer Plummer Potato Creek St. Park Potato Creek St. Park Roanoke Roanoke Sandcut Sandcut S. Bend - Shields Dr. S. Bend - Shields Dr. St. Philips St. Philips Terre Haute - Lafayette Ave. Terre Haute - Lafayette Ave. Trafalgar Trafalgar Valparaiso Valparaiso West Union West Union Whitestown Whitestown Whiting - HS Whiting - HS
Ozone Monitor Sites
County City Site
Allen Fort Wayne Fort Wayne - Beacon St.
Allen Leo Leo
Bartholomew Hope Hope
Boone Whitestown Whitestown
Brown Nashville Helmsburg
Carroll Flora Flora
Cass, MI Cassopolis Cassopolis
Clark Charlestown Charlestown St. Park
Clark, IL West Union West Union
Delaware Albany Albany
Elkhart Bristol Bristol
Floyd New Albany New Albany
Greene Plummer Plummer
Hamilton Noblesville Noblesville - 191st St.
Hancock Fortville Fortville*
Hendricks Avon Avon
Huntington Roanoke Roanoke
Jackson Brownstown Brownstown
Johnson Trafalgar Trafalgar
Lake Hammond Hammond - 141st St.
Lake Gary Gary - IITRI
Lake Whiting Whiting - HS*
LaPorte Michigan City Michigan City - W. Michigan Blvd.
LaPorte LaPorte LaPorte - E. Lincolnway
Madison Emporia Emporia
Marion Indianapolis Indpls - E 16th St.
Marion Indianapolis Indpls - Ft. Harrison
Marion Indianapolis Indpls - Harding St.
Marion Indianapolis Indpls - I-70 E
Marion Indianapolis Indpls - Washington Park
Morgan Monrovia Monrovia
Perry Leopold Leopold
Porter Ogden Dunes Ogden Dunes (Diana Rd)
Porter Valparaiso Valparaiso
Posey St. Philips St. Philips
Shelby Fairland Fairland
St. Joseph Granger Granger - Beckley St.
St. Joseph N. Liberty Potato Creek St. Park
St. Joseph South Bend S. Bend - Shields Dr.
Vigo Sandcut Sandcut
Vanderburgh Evansville Evansville - Buena Vista
Vanderburgh Inglefield Inglefield
Vigo Terre Haute Terre Haute - Lafayette Ave.
Warrick Boonville Boonville
Warrick Dayville Dayville
Warrick Lynnville Lynnville

* This link accesses historical data.

Air Ambient Monitor Links