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Daily Maximum Eight-Hour Ozone Averages for August 2017

The table below lists the peak daily maximum eight-hour ozone concentrations measured in August 2017 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 SitePOCAugust 2017POCMonitoring Site
123456789101112131415161718192021
North West
Hammond-141st St147584324363644424652463446485447354239NVNA1Hammond-141st St
Ogden Dunes146563826383444414751483241465746354541NVNA1Ogden Dunes
Michigan City-W. Michigan Blvd151554229453837465355483238555848385138NVNA1Michigan City-W. Michigan Blvd
Valparaiso141543823363443395152483235485346364540NVNA1Valparaiso
Gary-IITRI144513821363443404552473244475645344339NANA1Gary-IITRI
LaPorte-E. Lincolnway1NANVNA2341354238515551333550NVNANA5042NVNA1LaPorte-E. Lincolnway
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
123456789101112131415161718192021
North Central
South Bend-Shields Dr14758472641374340515752374152545041544354NA1South Bend-Shields Dr
Bristol14757442735354139495451364048524938494150NA1Bristol
Potato Creek State Park14050412236304137465149333346514638434146NA1Potato Creek State Park
Granger-Beckley St14555422538344138475450363848NANANANANANANA1Granger-Beckley St
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
123456789101112131415161718192021
North East
Fort Wayne-Beacon St14855482936334440495847414553495039434354NA1Fort Wayne-Beacon St
Leo HS1515648293732423953NANANANANANANANANANANANA1Leo HS
Roanoke Elem. School14452433034314335465446404451434938394350NA1Roanoke Elem. School
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
123456789101112131415161718192021
West Central
Terre Haute-Lafayette Ave14950453033313837535544414354454241415356NA1Terre Haute-Lafayette Ave
Flora14250472731263934435542413949434839364251NA1Flora
Sandcut14746442930273636505342393947423940394851NA1Sandcut
West Union145434130302437404947393945473836393943NVNA1West Union
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
123456789101112131415161718192021
East Central
Indpls-E.16th St13855512835274241496049464947494840405858NA1Indpls-E.16th St
Emporia13954492734283938486152414645504739404756NA1Emporia
Albany14255512831283634445343374449434938354152NA1Albany
Indpls-Washington Park14054512734254242485946454848474940385657NA1Indpls-Washington Park
Indpls-Harding St14150492634274142505643454746434339365553NA1Indpls-Harding St
Indpls-Ft. Harrison13755522734263940485948444847475041395360NA1Indpls-Ft. Harrison
Monrovia13644442730224044425242433942403539374949NA1Monrovia
Trafalgar13745472730243840515341474141414037374850NA1Trafalgar
Whitestown14142432429253533515042394645434739384752NA1Whitestown
Avon14248502732273939515341444447NANANANANANANA1Avon
Fairland14250493035273839496448454744494739415953NA1Fairland
Noblesville-191st St1415357283326NV36485648434850475238394654NA1Noblesville-191st St
Hope14250523133223740525844474244444435384948NA1Hope
Indpls - I-70 E139414920272626NV474635344847354937284451NA1Indpls - I-70 E
Helmsburg13744493133204042535245484144413936404850NA1Helmsburg
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
123456789101112131415161718192021
South West
Boonville152514732422840445162384755464431364552NVNA1Boonville
Evansville-Buena Vista Rd149494631372441475456334453443932364250NVNA1Evansville-Buena Vista Rd
Lynnville151474430362536404754344350393729344049NVNA1Lynnville
Inglefield152514633402741444958364553443635374350NVNA1Inglefield
St. Philips149524433392843485759354653453933384448NVNA1St. Philips
Leopold147535033302735415757404248364440294755NVNA1Leopold
Dayville146484733382841NVNANANANANANANANANANANANANA1Dayville
Plummer146514932352440455257444244504438384250NVNA1Plummer
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
123456789101112131415161718192021
South East
New Albany14744503442263244575743455539444325455450NA1New Albany
Charlestown State Park14849563544253245535949465045465329445460NA1Charlestown State Park
Brownstown14549543236233842505341464541403838NANANANA1Brownstown
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.