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Daily Maximum Eight-Hour Ozone Averages for August 2018

The table below lists the peak daily maximum eight-hour ozone concentrations measured in August 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 SitePOCAugust 2018POCMonitoring Site
12345678910111213141516171819
North West
Hammond-141st St1454456454441483245413740364327344533NA1Hammond-141st St
Ogden Dunes1535262534945543555504148474929415931NA1Ogden Dunes
Michigan City-W. Michigan Blvd1635560625244553364494349465232435832NA1Michigan City-W. Michigan Blvd
Valparaiso1525369504937443949494242495228434730NA1Valparaiso
Gary-IITRI1555466555244513658504349NVNANANANANANA1Gary-IITRI
LaPorte-E. Lincolnway1514963504737NV3352454242415127384528NA1LaPorte-E. Lincolnway
AreaMonitoring SitePOCAugust 2018POCMonitoring Site
12345678910111213141516171819
North Central
South Bend-Shields Dr1565162625141544051474142425732334337NA1South Bend-Shields Dr
Bristol1534659554438454044423637385029254033NA1Bristol
Potato Creek State Park1494457474131423440454435414726323833NA1Potato Creek State Park
Granger-Beckley St1554857584938483855433838405330304034NA1Granger-Beckley St
AreaMonitoring SitePOCAugust 2018POCMonitoring Site
12345678910111213141516171819
North East
Fort Wayne-Beacon St1475047534740373944493940454929253935NA1Fort Wayne-Beacon St
Leo HS1485353595145424246474141484932284136NA1Leo HS
Roanoke Elem. School1444240454038343540404235474024273632NA1Roanoke Elem. School
AreaMonitoring SitePOCAugust 2018POCMonitoring Site
12345678910111213141516171819
West Central
Terre Haute-Lafayette Ave1504849514539384346464045404823263540NA1Terre Haute-Lafayette Ave
Flora1474246424036374042443935384120284034NA1Flora
Sandcut1484646464137374242433646364522243536NA1Sandcut
West Union1464043443734323741394040414121273240NA1West Union
AreaMonitoring SitePOCAugust 2018POCMonitoring Site
12345678910111213141516171819
East Central
Emporia1445156554939384452573737435524274139NA1Emporia
Albany1434956604939414047463434384425254432NA1Albany
Indpls-Washington Park152515356534136424949374044481924NVNVNA1Indpls-Washington Park
Indpls-Harding St1544849525238374149463943474620243346NA1Indpls-Harding St
Indpls-Ft. Harrison1455454565341364148493538414919253238NA1Indpls-Ft. Harrison
Monrovia1474547514540364147413645554121303647NA1Monrovia
Whitestown1465251504740344040423639394419273938NA1Whitestown
Avon1444445484438343941403640423917253342NA1Avon
Fairland1474850514740374251474039414722293839NA1Fairland
Noblesville-191st St1445755545147384346533637414821264339NA1Noblesville-191st St
Hope1505151544841404445454640404525284336NA1Hope
Indpls - I-70 E1454847524938313339362831313720242932NA1Indpls - I-70 E
Kokomo - E. Vaile Ave.1NA4846474438404243453936384422304134NA1Kokomo - E. Vaile Ave.
Helmsburg14549NANANANANANANANANANANANANANANANANA1Helmsburg
AreaMonitoring SitePOCAugust 2018POCMonitoring Site
12345678910111213141516171819
South West
Boonville1505857554440424450395141485428374545NA1Boonville
Evansville-Buena Vista Rd1NV5453523837363843494442445021324242NA1Evansville-Buena Vista Rd
Inglefield1495152553937384046524743455322334442NA1Inglefield
St. Philips1484648453636333740484342394821364443NA1St. Philips
Leopold1404454544841464445455338395426354639NA1Leopold
Dayville1NVNANA503638414145365137454823394442NA1Dayville
Plummer1464956584939364046463740424924314338NA1Plummer
AreaMonitoring SitePOCAugust 2018POCMonitoring Site
12345678910111213141516171819
South East
New Albany1416452564538444244484940425122293640NA1New Albany
Charlestown State Park1415056646041454246604736415323333841NA1Charlestown State Park
Brownstown1444949524039353943394136414123263335NA1Brownstown
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.