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Daily Maximum Eight-Hour Ozone Averages for October 2017

The table below lists the peak daily maximum eight-hour ozone concentrations measured in October 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 SitePOCOctober 2017POCMonitoring Site
1234567891011121314151617181920212223
North West
Hammond-141st St139513322302939404127191229282728334336463943391Hammond-141st St
Ogden Dunes138523427323441413832201634283232384640564344451Ogden Dunes
Michigan City-W. Michigan Blvd1375233283233393737252019332933253744NVNANANA451Michigan City-W. Michigan Blvd
Valparaiso138513221353038404623181735262632394536544036401Valparaiso
Gary-IITRI137493226332938384028221530252129354039504042411Gary-IITRI
LaPorte-E. Lincolnway138513422363240384529191834293030374438554334421LaPorte-E. Lincolnway
AreaMonitoring SitePOCOctober 2017POCMonitoring Site
1234567891011121314151617181920212223
North Central
South Bend-Shields Dr140524024413142394834222237292730384537544736201South Bend-Shields Dr
Bristol140514024453140364726201936262929374339544838131Bristol
Potato Creek State Park14052382143324038473520203628273038443956NVNANA1Potato Creek State Park
Granger-Beckley St1NANANA23402842375034232335302830374339524736181Granger-Beckley St
AreaMonitoring SitePOCOctober 2017POCMonitoring Site
1234567891011121314151617181920212223
North East
Fort Wayne-Beacon St140524631372937313536171737432931404343534940291Fort Wayne-Beacon St
Leo HS1395247333927383237NANV1936383130414443514840261Leo HS
Roanoke Elem. School140514832352938323435161639472931404445544740261Roanoke Elem. School
AreaMonitoring SitePOCOctober 2017POCMonitoring Site
1234567891011121314151617181920212223
West Central
Terre Haute-Lafayette Ave143524036344737282738112342522934404448514538231Terre Haute-Lafayette Ave
Sandcut142504134344336292737121943502732404546514338231Sandcut
West Union142513736324835252837142342482935414448524436231West Union
AreaMonitoring SitePOCOctober 2017POCMonitoring Site
1234567891011121314151617181920212223
East Central
Indpls-E.16th St14049422930343424182411937412533364142474340241Indpls-E.16th St
Emporia14250443434443829253115NANANANA34394348554641291Emporia
Albany13948453732343428282513937442531384346524740311Albany
Indpls-Washington Park14050412624353425182212837412534343843444440241Indpls-Washington Park
Indpls-Harding St142503927254135251422101134382530343745434739251Indpls-Harding St
Indpls-Ft. Harrison143514429303935272127131140442635374147504642261Indpls-Ft. Harrison
Monrovia138444031324234241921121332402631373944463936211Monrovia
Trafalgar141494335334838NANA20151536422734404347514639281Trafalgar
Whitestown143473933243834302431111039452533394146484236211Whitestown
Avon1384540282941362119NANANANANANANANANANANANANANA1Avon
Fairland143524438345034262423151745442735424451574844261Fairland
Noblesville-191st St143504636314038282532131041472735414350514743271Noblesville-191st St
Hope139494636325333232122141339452435414349544643281Hope
Indpls - I-70 E140494126243434231723101037412521343935NV4439241Indpls - I-70 E
Helmsburg138474330314634212221161435432834394146464440241Helmsburg
AreaMonitoring SitePOCOctober 2017POCMonitoring Site
1234567891011121314151617181920212223
South West
Boonville142424052465531262916142342402633404445454237201Boonville
Evansville-Buena Vista Rd142424050455527252614142638392433374139NVNANANA1Evansville-Buena Vista Rd
Lynnville139393945425127192214122438372631283841393933161Lynnville
Inglefield14243394945543025281616203741263436NV43454336211Inglefield
St. Philips145454252485731262819182643452836404346474437241St. Philips
Leopold142404251445432252120142136432434394546474338221Leopold
Dayville142423950445627262415142141382634384346444336201Dayville
Plummer141454747385436201629142440462635414349494238221Plummer
AreaMonitoring SitePOCOctober 2017POCMonitoring Site
1234567891011121314151617181920212223
South East
New Albany143434148424724241314152133382434323043383736191New Albany
Charlestown State Park144465152445431271622172043452336363948524639281Charlestown State Park
Brownstown141524049355230212022132039412535404048524339251Brownstown
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.