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Peak Daily One-Hour Ozone Averages for January 2020

The table below lists the peak daily one-hour ozone concentrations measured in January 2020 in each community where the IDEM measures ozone. Concentrations are color-highlighted based on the EPA-defined Air Quality Index colors. (See Interpreting the AQI.) All ozone measurements are in parts per billion, and are truncated to an integer number.

The values that go into this table are calculated at 3:30 am each morning. Therefore, the current day will almost always have very low hourly averages that are not truly representative of local conditions for the day. Because of this, the report does not display the current day's data.

Use the selection boxes below to customize this report. You may select a different month, a different year, a different report format, and whether or not to include time on the report. Click on the Generate Report button once you have made your selections.

Month:Year:Report Format: Include time:
Include time
Highlight using AQI colors
AreaMonitoring SitePOCJanuary 2020POCMonitoring Site
1234567891011121314151617181920
North West
Hammond-141st St132292833312926323126352319182026292725391Hammond-141st St
Ogden Dunes132312933303028323231363220241631302725381Ogden Dunes
Michigan City-W. Michigan Blvd134343339343531373735393624242633332841441Michigan City-W. Michigan Blvd
Valparaiso131302830313128303230332820221628282623341Valparaiso
Gary-IITRI132322931303026313330363121231130312624371Gary-IITRI
LaPorte-E. Lincolnway130302934313127343231323022212029272732371LaPorte-E. Lincolnway
AreaMonitoring SitePOCJanuary 2020POCMonitoring Site
1234567891011121314151617181920
North Central
South Bend-Shields Dr133332735353129343435323022231927272621331South Bend-Shields Dr
Bristol133322635363129343433322922222330272624361Bristol
Potato Creek State Park133322736323228343535333024241930282824401Potato Creek State Park
Granger-Beckley St131312635363130343333322722222128262521321Granger-Beckley St
AreaMonitoring SitePOCJanuary 2020POCMonitoring Site
1234567891011121314151617181920
North East
Fort Wayne-Beacon St132322633353132333434332825232228252825421Fort Wayne-Beacon St
Leo HS134352637383336363635333127242431272927441Leo HS
Roanoke Elem. School13434NANANANANANANANANANANANANANANANANANA1Roanoke Elem. School
AreaMonitoring SitePOCJanuary 2020POCMonitoring Site
1234567891011121314151617181920
West Central
Terre Haute-Lafayette Ave132321731322930273431292822211924203028221Terre Haute-Lafayette Ave
Flora133332032333033303533323025251825272727281Flora
Sandcut136341832343433313834323027232027243130251Sandcut
West Union135331831353433293734302926232527223130241West Union
AreaMonitoring SitePOCJanuary 2020POCMonitoring Site
1234567891011121314151617181920
East Central
Emporia136331832343133303535333026252027262929371Emporia
Albany135351933333132323636332927252028273028381Albany
Indpls-Washington Park138361733363235323836343126262327263030361Indpls-Washington Park
Indpls-Harding St136331131343130293533323024231925252828291Indpls-Harding St
Indpls-Ft. Harrison137351630343034333331292925252026262929351Indpls-Ft. Harrison
Monrovia1383618323336333139363130282912NANANANANA1Monrovia
Whitestown135341732332831303635NANA19271926252929321Whitestown
Avon135351633353133303833293024261925232929291Avon
Fairland137331630343333313734313029262226243029311Fairland
Noblesville-191st St137341730343233293432322924262126262728341Noblesville-191st St
Hope137321932343536353839333129262831243231351Hope
Indpls - I-70 E13532926312823223434292723201619202526211Indpls - I-70 E
Kokomo - E. Vaile Ave.133322031332832293333312923251627262626331Kokomo - E. Vaile Ave.
Helmsburg139352032363835354140323230282731243332321Helmsburg
AreaMonitoring SitePOCJanuary 2020POCMonitoring Site
1234567891011121314151617181920
South West
Boonville138312127353433353837302525302429243332271Boonville
Evansville-Buena Vista Rd139331829363731353836322624292630243534271Evansville-Buena Vista Rd
Inglefield138321926353630363734302424262327233331261Inglefield
St. Philips13934192837343133403534262231252819NANANA1St. Philips
Leopold140342728363736384041322527332431263633281Leopold
Dayville14029212836363427NA34312525262430253532271Dayville
Plummer138332130343634343838313028262629263332291Plummer
AreaMonitoring SitePOCJanuary 2020POCMonitoring Site
1234567891011121314151617181920
South East
New Albany138302330343336373836302421292333243232271New Albany
Charlestown State Park1373128323136373938393224222624332521NANA1Charlestown State Park
Brownstown13833NANANANANANANANANANANANANANANANANANA1Brownstown
NA - Data not available.

Interpreting the AQI

Air Quality Index

Each NAAQS pollutant has a separate AQI scale, with an AQI rating of 100 corresponding to the concentration of the Federal Standard for that pollutant. Additional information about the AQI and how it can be used is available from the EPA's AirNow web site.

Place your mouse pointer over the scale displayed above to view information about the Air Quality Index, and each of the rating levels.

The actual index calculation is different for each parameter measured and is specified by the EPA. The following table shows the various breakpoints used in calculating the AQI.

AQI Breakpoint Definitions
AQI Range 1hr Ozone
in ppm
8hr Ozone
in ppm
0 - 50 Not Defined 0 - 0.054
51 - 100 Not Defined 0.055 - 0.070
101 - 150 0.125 - 0.164 0.071 - 0.085
151 - 200 0.165 - 0.204 0.086 - 0.105
201 - 300 0.205 - 0.404 0.106 - 0.200
301 - 400 0.405 - 0.504 0.201 - 0.2011
401 - 500 0.505 - 0.604 Not Defined
500+ Not Defined Not Defined

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.