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Daily Maximum Eight-Hour Ozone Averages for February 2019

The table below lists the peak daily maximum eight-hour ozone concentrations measured in February 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 SitePOCFebruary 2019POCMonitoring Site
1234567891011121314151617181920
North West
Hammond-141st St119232523251929292418203530292837314031NA1Hammond-141st St
Ogden Dunes128292725NVNANANANANANANANANANANANANANANA1Ogden Dunes
Michigan City-W. Michigan Blvd131312826311731323324274037333640354037NA1Michigan City-W. Michigan Blvd
Valparaiso131332824261733343525294138343439344040NA1Valparaiso
LaPorte-E. Lincolnway129322524241530313224273735303437334039NA1LaPorte-E. Lincolnway
AreaMonitoring SitePOCFebruary 2019POCMonitoring Site
1234567891011121314151617181920
North Central
South Bend-Shields Dr131342826241030323425283735303337343940NA1South Bend-Shields Dr
Bristol13035272620930353425273636313435334037NA1Bristol
Potato Creek State Park132383331251431333327304039323638354244NA1Potato Creek State Park
Granger-Beckley St130NVNANANA1129363524283535323538354039NA1Granger-Beckley St
AreaMonitoring SitePOCFebruary 2019POCMonitoring Site
1234567891011121314151617181920
North East
Fort Wayne-Beacon St12729352418930323224293937323233333838NA1Fort Wayne-Beacon St
Leo HS132323928221432353627314341353536364242NA1Leo HS
Roanoke Elem. School1NANANA231683131NANANANA36343331313733NA1Roanoke Elem. School
AreaMonitoring SitePOCFebruary 2019POCMonitoring Site
1234567891011121314151617181920
West Central
Terre Haute-Lafayette Ave1212139261843134321893737393535NVNANANA1Terre Haute-Lafayette Ave
Flora12930353120633343422244240373635293942NA1Flora
Sandcut12526412719532343321143838403536253336NA1Sandcut
West Union11922372417532343020123637383434243636NA1West Union
AreaMonitoring SitePOCFebruary 2019POCMonitoring Site
1234567891011121314151617181920
East Central
Emporia12526393216730333324153838353632273738NA1Emporia
Albany12632403416730333122133938363530253936NA1Albany
Indpls-Washington Park11822372316231343318103838343535253836NA1Indpls-Washington Park
Indpls-Harding St1151834219024293317834343833NANANA41NA1Indpls-Harding St
Indpls-Ft. Harrison1211832231412831301893333313130223334NA1Indpls-Ft. Harrison
Monrovia12431433417530333422113737413434253437NA1Monrovia
Whitestown12628382320531333320133837353534263836NA1Whitestown
Avon11628402216NANA34301963838383634203429NA1Avon
Fairland12419402915330333323123737383433243436NA1Fairland
Noblesville-191st St12424392717431343320133838373633253936NA1Noblesville-191st St
Hope126214229151030343424143638403534243337NA1Hope
Indpls - I-70 E1192134231022726311893130302826222231NA1Indpls - I-70 E
Kokomo - E. Vaile Ave.1262937291963234NVNANANANA3636NVNANA40NA1Kokomo - E. Vaile Ave.
Helmsburg12424413114831353322123739423735243338NA1Helmsburg
AreaMonitoring SitePOCFebruary 2019POCMonitoring Site
1234567891011121314151617181920
South West
Boonville123273929101931353322213638403532303335NA1Boonville
Evansville-Buena Vista Rd11924372591831353219213738413629313534NA1Evansville-Buena Vista Rd
Inglefield123283825101831343221203636413431303435NA1Inglefield
St. Philips125304128142131353220213637413528303534NA1St. Philips
Leopold127404530151928343024203436413432243235NA1Leopold
Dayville125313825112130353121213637403530303434NA1Dayville
Plummer1282741291583134NVNANV3638403636253738NA1Plummer
AreaMonitoring SitePOCFebruary 2019POCMonitoring Site
1234567891011121314151617181920
South East
New Albany11715391711172734301783335363628233036NA1New Albany
Charlestown State Park122234329121726343122193337363729253038NA1Charlestown State Park
Brownstown122164127121330343122153538403634223235NA1Brownstown
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.