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Daily Maximum Eight-Hour Ozone Averages for June 2021

The table below lists the peak daily maximum eight-hour ozone concentrations measured in June 2021 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 SitePOCJune 2021
123456789101112
North West
Hammond-141st St159597667605521535251NVNA
Ogden Dunes134668168585521556154NVNA
Michigan City-W. Michigan Blvd157688371595626586052NVNA
Valparaiso163598066585425475151NVNA
Gary-IITRI159647665575420495752NVNA
LaPorte-E. Lincolnway160507868585521445147NVNA
AreaMonitoring SitePOCJune 2021
123456789101112
North Central
South Bend-Shields Dr162476967595625405448NVNA
Bristol156406466555524394743NVNA
Potato Creek State Park160446865555121405144NVNA
Granger-Beckley St164476972625925395243NVNA
AreaMonitoring SitePOCJune 2021
123456789101112
North East
Fort Wayne-Beacon St151285359554825363741NVNA
Leo HS157346169665831414348NVNA
AreaMonitoring SitePOCJune 2021
123456789101112
West Central
Terre Haute-Lafayette Ave148295763543333333134NVNA
Flora155357066594735453742NVNA
Sandcut149295864543234352833NVNA
West Union150335864NANANA323438NVNA
AreaMonitoring SitePOCJune 2021
123456789101112
East Central
Anderson-Eastside Elem. School256344769634931363539NVNA
Albany153314566635031353440NVNA
Indpls-Washington Park156304265514030323336NVNA
Indpls-Harding St149283763523326283030NVNA
Indpls-Ft. Harrison157334969584534352935NVNA
Whitestown157316164563834363840NVNA
Avon152294963513330303138NVNA
Fairland150303662523729302930NVNA
Noblesville-191st St158325668594835383738NVNA
Hope151NV35NVNANA33302935NVNA
Indpls - I-70 E154303660513730303330NVNA
Kokomo - E. Vaile Ave.15834NVNVNVNV35433845NVNA
Helmsburg14530NV60513232252429NVNA
AreaMonitoring SitePOCJune 2021
123456789101112
South West
Boonville135304166553028283235NVNA
Evansville-Buena Vista Rd133273764502926282932NVNA
Inglefield13230416452302928323346NA
St. Philips128263862492625243031NVNA
Leopold133353961532929242837NVNA
Dayville133304465533026273232NVNA
Plummer146324166583338283836NVNA
AreaMonitoring SitePOCJune 2021
123456789101112
South East
New Albany136273465533430252534NVNA
Charlestown State Park136313368603028262541NVNA
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.