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Daily Maximum Eight-Hour Ozone Averages for October 2018

The table below lists the peak daily maximum eight-hour ozone concentrations measured in October 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 SitePOCOctober 2018POCMonitoring Site
12345678910111213141516171819
North West
Hammond-141st St1141327271118927281423172526NVNA2727141Hammond-141st St
Ogden Dunes1302036341723113739212821313323333333181Ogden Dunes
Michigan City-W. Michigan Blvd1322537352223104040233530333928343630241Michigan City-W. Michigan Blvd
Valparaiso139163631181893939202327323422342735231Valparaiso
Gary-IITRI1NV17353315NANANANV202119303120322731151Gary-IITRI
LaPorte-E. Lincolnway1392034312015NVNANA183023303323333032171LaPorte-E. Lincolnway
AreaMonitoring SitePOCOctober 2018POCMonitoring Site
12345678910111213141516171819
North Central
South Bend-Shields Dr143223728231794238213025313424332933291South Bend-Shields Dr
Bristol137223623211993837202930313225322831231Bristol
Potato Creek State Park139213429221684136222527303323313033261Potato Creek State Park
Granger-Beckley St136243627221584036193131303226322930151Granger-Beckley St
AreaMonitoring SitePOCOctober 2018POCMonitoring Site
12345678910111213141516171819
North East
Fort Wayne-Beacon St149293928233194437202335323525332933111Fort Wayne-Beacon St
Leo HS143303928243211433722253431332533293281Leo HS
Roanoke Elem. School1512939272229144635212233323323322833121Roanoke Elem. School
AreaMonitoring SitePOCOctober 2018POCMonitoring Site
12345678910111213141516171819
West Central
Terre Haute-Lafayette Ave145343624323839433623282731262431343411Terre Haute-Lafayette Ave
Flora1492337282533324137232728323525332736191Flora
Sandcut143313625273840443525292730272331333351Sandcut
West Union142353522353841413722272630232328333321West Union
AreaMonitoring SitePOCOctober 2018POCMonitoring Site
12345678910111213141516171819
East Central
Emporia1473340232242454438252529322622302933181Emporia
Albany149263722194032443723253031281932283281Albany
Indpls-Washington Park1402837231537384235222526272320NANANANA1Indpls-Washington Park
Indpls-Harding St137243320193837383522232328241927292611Indpls-Harding St
Indpls-Ft. Harrison1NA263421153638403420242527221927292811Indpls-Ft. Harrison
Monrovia1423240232741394138222427292123293134111Monrovia
Whitestown1483140272239434538212528333022333138181Whitestown
Avon141293825193637393620262629212230313341Avon
Fairland149344122314444433925252834201931313781Fairland
Noblesville-191st St148294026164043463721262929282233293311Noblesville-191st St
Hope1443439213042414337252429321919273137101Hope
Indpls - I-70 E141193815183938423522181828231325202111Indpls - I-70 E
Kokomo - E. Vaile Ave.145253626193431NANANA2529313022312534201Kokomo - E. Vaile Ave.
Helmsburg135323821314036413822253029201826333611Helmsburg
AreaMonitoring SitePOCOctober 2018POCMonitoring Site
12345678910111213141516171819
South West
Boonville141383531394039403527233128171518NVNANA1Boonville
Evansville-Buena Vista Rd13733332532373738332023282514111829NVNA1Evansville-Buena Vista Rd
Inglefield13734362934404041352425323018162231NVNA1Inglefield
St. Philips138363929394241403825263328171724353531St. Philips
Leopold1373736344041423834262532291515223434121Leopold
Dayville139343533404036373628263228151617333421Dayville
Plummer1473540193542434334NANA2731232027343741Plummer
AreaMonitoring SitePOCOctober 2018POCMonitoring Site
12345678910111213141516171819
South East
New Albany1NA31293036334033342024343113161733NVNA1New Albany
Charlestown State Park133363533413946403625NV3432151617343711Charlestown State Park
Brownstown141403823374340404124253134211827353631Brownstown
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.