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Daily Maximum Eight-Hour Ozone Averages for October 2019

The table below lists the peak daily maximum eight-hour ozone concentrations measured in October 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 SitePOCOctober 2019POCMonitoring Site
1234567891011121314151617
North West
Hammond-141st St1292016282632263341252234332427NVNA1Hammond-141st St
Ogden Dunes132202130273325354034223635243424191Ogden Dunes
Michigan City-W. Michigan Blvd134182231303322394537263534223624181Michigan City-W. Michigan Blvd
Valparaiso13217202728342834413424353526332291Valparaiso
Gary-IITRI133162031283328384232233634273319151Gary-IITRI
LaPorte-E. Lincolnway132192026293528354336273535243524181LaPorte-E. Lincolnway
AreaMonitoring SitePOCOctober 2019POCMonitoring Site
1234567891011121314151617
North Central
South Bend-Shields Dr136222025343530424642283736254025181South Bend-Shields Dr
Bristol135161921303228373939253435233926151Bristol
Potato Creek State Park133231924313428374439323536253825161Potato Creek State Park
Granger-Beckley St133151822313228364338253434233726201Granger-Beckley St
AreaMonitoring SitePOCOctober 2019POCMonitoring Site
1234567891011121314151617
North East
Fort Wayne-Beacon St13635222431333141404331354029452291Fort Wayne-Beacon St
Leo HS139352427333533424244313742314627171Leo HS
Roanoke Elem. School1NANANANANANANA393738283539264324111Roanoke Elem. School
AreaMonitoring SitePOCOctober 2019POCMonitoring Site
1234567891011121314151617
West Central
Terre Haute-Lafayette Ave14346243040253238403520333632312191Terre Haute-Lafayette Ave
Flora137352126343332NANANANA384031402361Flora
Sandcut14345263139253442433623374036362591Sandcut
West Union142452533412333394236253740373223111West Union
AreaMonitoring SitePOCOctober 2019POCMonitoring Site
1234567891011121314151617
East Central
Emporia144432825393230414444313441334123111Emporia
Albany144432922363730414343NVNANANA4524141Albany
Indpls-Washington Park1424527284028334141392834393439NVNA1Indpls-Washington Park
Indpls-Harding St13941242741243041424026333932372271Indpls-Harding St
Indpls-Ft. Harrison142442628412935424442303540354124111Indpls-Ft. Harrison
Monrovia14340303037273340403928344036412261Monrovia
Whitestown14141263042333745484026374035412381Whitestown
Avon139412427372331373838243438324024111Avon
Fairland14444302646253141424531364338422391Fairland
Noblesville-191st St141402626382835414442283540334324131Noblesville-191st St
Hope150463730462831444345333644414524121Hope
Indpls - I-70 E137351717402320354038NANANANANANA41Indpls - I-70 E
Kokomo - E. Vaile Ave.13736222435323238434129343829412291Kokomo - E. Vaile Ave.
Helmsburg14545313038213040423830354138422231Helmsburg
AreaMonitoring SitePOCOctober 2019POCMonitoring Site
1234567891011121314151617
South West
Boonville147473936462931414244293643NVNANA31Boonville
Evansville-Buena Vista Rd14543353745272940404326364343342461Evansville-Buena Vista Rd
Inglefield144413536462829414343253441413424111Inglefield
St. Philips14645374049263342444526364345352571St. Philips
Leopold1505145355039313825423535434540NV91Leopold
Dayville14344383241242737384024314040312211Dayville
Plummer14743303642233242414327364241392181Plummer
AreaMonitoring SitePOCOctober 2019POCMonitoring Site
1234567891011121314151617
South East
New Albany144474433474124331837263337423421111New Albany
Charlestown State Park14848473553402737254432354046382281Charlestown State Park
Brownstown149463833453030454048333642443924121Brownstown
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.