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Daily Maximum Eight-Hour Ozone Averages for July 2020

The table below lists the peak daily maximum eight-hour ozone concentrations measured in July 2020 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 SitePOCJuly 2020
123456789
North West
Hammond-141st St1616065514576685756
Ogden Dunes1666774524572626960
Michigan City-W. Michigan Blvd1656474504564736866
Valparaiso1636166494964586658
Gary-IITRI1606171494267606560
LaPorte-E. Lincolnway1635861454954645954
AreaMonitoring SitePOCJuly 2020
123456789
North Central
South Bend-Shields Dr1595663465356656258
Bristol1505457515355625656
Potato Creek State Park1626167525559626056
Granger-Beckley St1544664495352655857
AreaMonitoring SitePOCJuly 2020
123456789
North East
Fort Wayne-Beacon St1535558565866635862
Leo HS1535557556067656060
AreaMonitoring SitePOCJuly 2020
123456789
West Central
Terre Haute-Lafayette Ave1476659565763555758
Flora1545058555157555154
Sandcut1456257545456495159
West Union1405558585652485256
AreaMonitoring SitePOCJuly 2020
123456789
East Central
Emporia1534959535557515651
Albany1625757555762615759
Indpls-Washington Park1525063546260565954
Indpls-Harding St1535366566655516345
Indpls-Ft. Harrison1524960485057515454
Whitestown1NANA62546069625857
Avon1455260516052545349
Fairland1484861536055525855
Noblesville-191st St1565259505760575663
Hope1475261566355565757
Indpls - I-70 E1464353465253494950
Kokomo - E. Vaile Ave.1625962535862635463
Helmsburg1375360555351474542
AreaMonitoring SitePOCJuly 2020
123456789
South West
Boonville1565263645446564751
Evansville-Buena Vista Rd1545562646253674650
Inglefield1534756604953654551
St. Philips144586062624955NV46
Leopold1395653644939484744
Dayville1495158626039534946
Plummer1455757585758545356
AreaMonitoring SitePOCJuly 2020
123456789
South East
New Albany1445753634866835160
Charlestown State Park13753545746NANV4851
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.