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Daily Maximum Eight-Hour Ozone Averages for August 2019

The table below lists the peak daily maximum eight-hour ozone concentrations measured in August 2019 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 2019POCMonitoring Site
1234567891011121314151617181920212223
North West
Hammond-141st St146526547574851414463514548NV33383440492543NVNA1Hammond-141st St
Ogden Dunes1435664486455554341614849534837413341472751NVNA1Ogden Dunes
Michigan City-W. Michigan Blvd1475964527552584243565562584942473948533658NVNA1Michigan City-W. Michigan Blvd
Valparaiso1485664595457584848605237524839443739483255NVNA1Valparaiso
Gary-IITRI146576750625557NV44655252544938423741522550NVNA1Gary-IITRI
LaPorte-E. Lincolnway1505363615654564041575237514839433637473258NVNA1LaPorte-E. Lincolnway
AreaMonitoring SitePOCAugust 2019POCMonitoring Site
1234567891011121314151617181920212223
North Central
South Bend-Shields Dr151516161585062394147524149504146414452386135NA1South Bend-Shields Dr
Bristol1474750545342413032413837404335423634NANV5731NA1Bristol
Potato Creek State Park151535561475349404149453347393740333246304936NA1Potato Creek State Park
Granger-Beckley St148505255584959363844474345474044394250385933NA1Granger-Beckley St
AreaMonitoring SitePOCAugust 2019POCMonitoring Site
1234567891011121314151617181920212223
North East
Fort Wayne-Beacon St150566257515546504442505045464647414046445136NA1Fort Wayne-Beacon St
Leo HS150556157515246474442535445494550454249485539NA1Leo HS
Roanoke Elem. School148525750425037453936434438423743373741334337NA1Roanoke Elem. School
AreaMonitoring SitePOCAugust 2019POCMonitoring Site
1234567891011121314151617181920212223
West Central
Terre Haute-Lafayette Ave154606361615551475061614746444346414150374233NA1Terre Haute-Lafayette Ave
Flora1455355575154453947NVNANA48444447373742384737NA1Flora
Sandcut150586057545450464956514241434044363846353732NA1Sandcut
West Union150536060544646464552553640403937NVNANANANANANA1West Union
AreaMonitoring SitePOCAugust 2019POCMonitoring Site
1234567891011121314151617181920212223
East Central
Emporia152576062635944454743534741494542394150415138NA1Emporia
Albany145535757525340424135464738444145334344404232NA1Albany
Indpls-Washington Park174616468626050445455574343484545384457414538NA1Indpls-Washington Park
Indpls-Harding St165606567595547435458544238424141364046NVNV32NA1Indpls-Harding St
Indpls-Ft. Harrison1706165666265534955NANANANANANA47404761444940NA1Indpls-Ft. Harrison
Monrovia154646564555347475158524240414045344141374134NA1Monrovia
Whitestown164606763616050455250564145454646374247NVNANANA1Whitestown
Avon157596759535443425053524041393943333842363932NA1Avon
Fairland156545861615550475048544641504544444347414534NA1Fairland
Noblesville-191st St160596564626148474843634945494850404461474938NA1Noblesville-191st St
Hope155545862625054545657565046504646454755424439NA1Hope
Indpls - I-70 E167495860544535323942544324323042364046363423NA1Indpls - I-70 E
Kokomo - E. Vaile Ave.150616261575948434939574349474447424047425240NA1Kokomo - E. Vaile Ave.
Helmsburg149535462544646524754484242434045364445393831NA1Helmsburg
AreaMonitoring SitePOCAugust 2019POCMonitoring Site
1234567891011121314151617181920212223
South West
Boonville16057545163455155515462384342384344NVNANANVNVNA1Boonville
Evansville-Buena Vista Rd1555956546538504850586437404235434138473435NVNA1Evansville-Buena Vista Rd
Inglefield1535654555739515151576038414435444038513737NVNA1Inglefield
St. Philips1526055545737434649545738424135424137403637NVNA1St. Philips
Leopold1525754566051516150555642464640504845NVNA51NVNA1Leopold
Dayville1565653466341485155525637414135394236403935NVNA1Dayville
Plummer154536061634651594352634441454050434454NVNANVNA1Plummer
AreaMonitoring SitePOCAugust 2019POCMonitoring Site
1234567891011121314151617181920212223
South East
New Albany154625963634847544559664542474144494245415038NA1New Albany
Charlestown State Park151595858624946514454524843484250514653444936NA1Charlestown State Park
Brownstown155565864564847554357514143454042444348424638NA1Brownstown
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.