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Daily Maximum Eight-Hour Ozone Averages for January 2018

The table below lists the peak daily maximum eight-hour ozone concentrations measured in January 2018 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 2018POCMonitoring Site
1234567891011121314151617181920212223
North West
Hammond-141st St126212021232125211025213826282120192123201429NA1Hammond-141st St
Ogden Dunes12526333635303024152924NVNANANANANA2733262133NA1Ogden Dunes
Michigan City-W. Michigan Blvd13428343435352920162725393628272925NVNANANANANA1Michigan City-W. Michigan Blvd
Valparaiso1NANANANA312528241525223633282822282833271930NA1Valparaiso
Gary-IITRI125251728262326211327203833292622242629231828NA1Gary-IITRI
LaPorte-E. Lincolnway133263235343029231524233836282820242835262131NA1LaPorte-E. Lincolnway
AreaMonitoring SitePOCJanuary 2018POCMonitoring Site
1234567891011121314151617181920212223
North Central
South Bend-Shields Dr1332832333028312517232636343227202529372920NVNA1South Bend-Shields Dr
Bristol13129353631283324162223373534282125NANA2921NVNA1Bristol
Potato Creek State Park1283029373128352821NANANANANANANA2732393023NVNA1Potato Creek State Park
Granger-Beckley St1352734343323312415222336353026182428352818NVNA1Granger-Beckley St
AreaMonitoring SitePOCJanuary 2018POCMonitoring Site
1234567891011121314151617181920212223
North East
Fort Wayne-Beacon St1292724341926322821262636343427212729343119NVNA1Fort Wayne-Beacon St
Leo HS1302929362930332924282737363430222930343319NVNA1Leo HS
Roanoke Elem. School1303027362425322922262737353227222732353122NVNA1Roanoke Elem. School
AreaMonitoring SitePOCJanuary 2018POCMonitoring Site
1234567891011121314151617181920212223
West Central
Terre Haute-Lafayette Ave1302730303327262415222332313027242332362926NVNA1Terre Haute-Lafayette Ave
Flora1312831242623332818212235322929222230322622NVNA1Flora
Sandcut1292732303429292718242733303331252534383329NVNA1Sandcut
West Union133282932322829261622263231333026253537312936NA1West Union
AreaMonitoring SitePOCJanuary 2018POCMonitoring Site
1234567891011121314151617181920212223
East Central
Emporia1NANANANANANANANANANANANANANANANA2233393229NVNA1Emporia
Albany1282228212425322718272835333126202331383228NVNA1Albany
Indpls-Washington Park133232927NANANANA13232234312926191623292423NVNA1Indpls-Washington Park
Indpls-Harding St1352428283125312717282636323430211931363028NVNA1Indpls-Harding St
Indpls-Ft. Harrison13425302731NVNANA17202236343129212130342924NANA1Indpls-Ft. Harrison
Monrovia1302929263126342719262932313229232332373330NVNA1Monrovia
Whitestown133302927302930281721NA3635292722242934282431NA1Whitestown
Avon1332931313331312615242635323129232232383224NVNA1Avon
Fairland1333027283024302822252735343231242333393228NVNA1Fairland
Noblesville-191st St1332829263131272515242334312928212631332924NVNA1Noblesville-191st St
Hope1342929293531312523272836353330252435NVNANANVNA1Hope
Indpls - I-70 E1281922172020252115242230242925151524302525NVNA1Indpls - I-70 E
Kokomo - E. Vaile Ave.1312629232629292915232335333029NV2532363025NVNA1Kokomo - E. Vaile Ave.
Helmsburg1353132323332342923293035343330252935413533NVNA1Helmsburg
AreaMonitoring SitePOCJanuary 2018POCMonitoring Site
1234567891011121314151617181920212223
South West
Boonville131272727273231232528273232343228253335363637NA1Boonville
Evansville-Buena Vista Rd126252426232829191623233031323326263034313035NA1Evansville-Buena Vista Rd
Inglefield126292526242831232123NVNANANANANANV3237353336NA1Inglefield
St. Philips130312829283032271925273231363528283642383539NA1St. Philips
Leopold132332831283236282532313736363127273841423838NA1Leopold
Dayville130272626243131222425253232363328253337383434NA1Dayville
Plummer1332929313331332722262836363433262734393735NVNA1Plummer
AreaMonitoring SitePOCJanuary 2018POCMonitoring Site
1234567891011121314151617181920212223
South East
New Albany1322827272827262619241435363130262732363832NVNA1New Albany
Charlestown State Park1342528293031342125302936363330282630303532NVNA1Charlestown State Park
Brownstown135293031323128252329293636342926283537353135NA1Brownstown
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.

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.