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Daily Maximum Eight-Hour Ozone Averages for January 2020

The table below lists the peak daily maximum eight-hour ozone concentrations measured in January 2020 in each community where the IDEM measures ozone. Concentrations that are rated Moderate or higher are color-highlighted based on the EPA-defined Air Quality Index colors. (See Interpreting the AQI.) All ozone measurements are in parts per billion.

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 with AQI colors
AreaMonitoring SitePOCJanuary 2020POCMonitoring Site
1234567891011121314151617181920
North West
Hammond-141st St129242730281828273024321817142025232524191Hammond-141st St
Ogden Dunes130272731282428313124343018172229232420181Ogden Dunes
Michigan City-W. Michigan Blvd132303237332834343527373323202732272636311Michigan City-W. Michigan Blvd
Valparaiso129262528282628283122312719181927242421271Valparaiso
Gary-IITRI131272727272323293222352619181429232421161Gary-IITRI
LaPorte-E. Lincolnway129262732292530313122302821162328232424321LaPorte-E. Lincolnway
AreaMonitoring SitePOCJanuary 2020POCMonitoring Site
1234567891011121314151617181920
North Central
South Bend-Shields Dr132302732302530313327302822182226232320311South Bend-Shields Dr
Bristol131282534292630313227292720182527242321321Bristol
Potato Creek State Park131302633292728323428282923202328252523381Potato Creek State Park
Granger-Beckley St129272534302830313125292520172426232119311Granger-Beckley St
AreaMonitoring SitePOCJanuary 2020POCMonitoring Site
1234567891011121314151617181920
North East
Fort Wayne-Beacon St131292433312729313231282723192327232523401Fort Wayne-Beacon St
Leo HS133322637352932333431302924212628262625431Leo HS
Roanoke Elem. School1 N33NVNANANANANANANANANANANANANANANANANANA1Roanoke Elem. School
AreaMonitoring SitePOCJanuary 2020POCMonitoring Site
1234567891011121314151617181920
West Central
Terre Haute-Lafayette Ave131281726292225253228272620151822182725191Terre Haute-Lafayette Ave
Flora131301931302427283230292823221924232623251Flora
Sandcut134311828322729303532302925212025232927221Sandcut
West Union133291927312728273532282823192125213027221West Union
AreaMonitoring SitePOCJanuary 2020POCMonitoring Site
1234567891011121314151617181920
East Central
Emporia133301731312529283434312925201925232826321Emporia
Albany133322032312628303334292825211626212826351Albany
Indpls-Washington Park133311531322431313333303023202025232927321Indpls-Washington Park
Indpls-Harding St132291329292125273131282721171922212725251Indpls-Harding St
Indpls-Ft. Harrison133301530312530293227282822191924222826311Indpls-Ft. Harrison
Monrovia1 N3634152831292929383528282623NVNANANANANA1Monrovia
Whitestown13330163030NA2828NVNANANANV221923222826291Whitestown
Avon134321531292628293631272722211923192826271Avon
Fairland133301130312930293633292926211924202726281Fairland
Noblesville-191st St132311731302730283230282822221924212725311Noblesville-191st St
Hope133301731323132313635312927222228233028291Hope
Indpls - I-70 E131271125271718213130252417121617192523171Indpls - I-70 E
Kokomo - E. Vaile Ave.131301931302528283131282720211724212523291Kokomo - E. Vaile Ave.
Helmsburg136331831343133343937312928232429233129281Helmsburg
AreaMonitoring SitePOCJanuary 2020POCMonitoring Site
1234567891011121314151617181920
South West
Boonville136291624303128323732282424242026243129241Boonville
Evansville-Buena Vista Rd1362917253331NV333630292520242027223231251Evansville-Buena Vista Rd
Inglefield135301723323027323629262322221924223028231Inglefield
St. Philips136301724313028313833292520262325NANANANA1St. Philips
Leopold138322125333432354038302425292229293430261Leopold
Dayville135281824323230NANA33292424202127243130251Dayville
Plummer135301928313229323736292826242227243129271Plummer
AreaMonitoring SitePOCJanuary 2020POCMonitoring Site
1234567891011121314151617181920
South East
New Albany132261627302832343129282318242130223030251New Albany
Charlestown State Park134281827293333373735302321232031NVNANANA1Charlestown State Park
Brownstown1 N34NVNANANANANANANANANANANANANANANANANANA1Brownstown
POC (Parameter Occurrence Code): a code used to correctly separate data from multiple instruments at one site.
NV - There are not enough valid eight-hour averages for this day (there must be eighteen valid eight-hour averages).
NA - Data not available.
 N - Data from this instrument does not meet EPA quality assurance criteria and cannot be used for regulatory purposes.

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.