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Peak Daily One-Hour Ozone Averages for October 2019

The table below lists the peak daily one-hour ozone concentrations measured in October 2019 in each community where the IDEM measures ozone. Concentrations are color-highlighted based on the EPA-defined Air Quality Index colors. (See Interpreting the AQI.) All ozone measurements are in parts per billion, and are truncated to an integer number.

The values that go into this table are calculated at 3:30 am each morning. Therefore, the current day will almost always have very low hourly averages that are not truly representative of local conditions for the day. Because of this, the report does not display the current day's data.

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 using AQI colors
AreaMonitoring SitePOCOctober 2019POCMonitoring Site
North West
Hammond-141st St1332719313138333745282838372834241Hammond-141st St
Ogden Dunes1363025343141334146383337392739271Ogden Dunes
Michigan City-W. Michigan Blvd1382924343343294449413738372539311Michigan City-W. Michigan Blvd
LaPorte-E. Lincolnway1362623333342314048403737392738301LaPorte-E. Lincolnway
AreaMonitoring SitePOCOctober 2019POCMonitoring Site
North Central
South Bend-Shields Dr1433225273939344849473340412744311South Bend-Shields Dr
Potato Creek State Park1393022253537344249443738392740281Potato Creek State Park
Granger-Beckley St1392723243336314046432936372542291Granger-Beckley St
AreaMonitoring SitePOCOctober 2019POCMonitoring Site
North East
Fort Wayne-Beacon St1383927273538364643483638423254261Fort Wayne-Beacon St
Leo HS1414130303740374746503639443455301Leo HS
Roanoke Elem. School1NANANANANANANA4643483538423148261Roanoke Elem. School
AreaMonitoring SitePOCOctober 2019POCMonitoring Site
West Central
Terre Haute-Lafayette Ave1475032334634374446402435403735261Terre Haute-Lafayette Ave
West Union1445030374733384448452940444236271West Union
AreaMonitoring SitePOCOctober 2019POCMonitoring Site
East Central
Indpls-Washington Park1454730314837394746464037433843301Indpls-Washington Park
Indpls-Harding St1414327314834374846453836423642281Indpls-Harding St
Indpls-Ft. Harrison1464730314839404748474038433946291Indpls-Ft. Harrison
Noblesville-191st St1434329284538394649484037433748301Noblesville-191st St
Indpls - I-70 E14142242147332443444439NANANANANA1Indpls - I-70 E
Kokomo - E. Vaile Ave.1393928273936354248463837413544281Kokomo - E. Vaile Ave.
AreaMonitoring SitePOCOctober 2019POCMonitoring Site
South West
Evansville-Buena Vista Rd1544641415731364746462839475139291Evansville-Buena Vista Rd
St. Philips1564742435831384853493039475039301St. Philips
AreaMonitoring SitePOCOctober 2019POCMonitoring Site
South East
New Albany1475348366446274121483537414937281New Albany
Charlestown State Park1575250386249294429513839435042261Charlestown State Park
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.