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Compliance with Eight-Hour Ozone Standard

In July 1997, the U. S. Environmental Protection Agency (EPA) announced a new National Ambient Air Quality Standard (NAAQS) for ground-level ozone. The EPA phased out and replaced the previous one-hour standard with an eight-hour standard to protect public health against longer exposure to this air pollutant. In March 2008, the EPA updated the eight-hour standard again. A community will meet the eight-hour standard when the three-year average of the annual fourth highest daily maximum eight-hour ozone concentration measured at each monitoring site is less than 71 parts per billion (ppb).

Highlighted rows show the monitor in each area that may ultimately be used to determine the area's compliance with the ozone standard. These highlighted monitors have measured an area's ozone concentrations over the past three years.

Below are the annual fourth highest daily maximum eight-hour average ozone concentrations from data collected beginning January 1, 2018, to date. Data is updated each hour. Data is given for each area that has ozone monitors.

Use the selection boxes below to customize this report. If you want to cut and paste data from this page into another application, such as a spreadsheet, select the comma-delimited format. Click on the Generate Report button once you have made your selections.

YearReport Format
AreaMonitoring SitePOCFourth Highest AverageCurrent
Three-Year
Average
201820192020
as of
3:07 am EDT
4/9/2020
North West
Michigan City-W. Michigan Blvd182714465
Ogden Dunes171684461
Gary-IITRI171654460
Valparaiso171714161
LaPorte-E. Lincolnway171614258
Hammond-141st St162654055
North Central
Granger-Beckley St170614558
Bristol170584056
Potato Creek State Park169614658
South Bend-Shields Dr1736540 **59
North East
Leo HS172634459
Roanoke Elem. School (Deactivated Jan 1, 2020)16660  ** 
Fort Wayne-Beacon St169634458
West Central
Flora166614256
Sandcut168614758
Terre Haute-Lafayette Ave169634358
West Union166604456
East Central
Indpls-Washington Park172664460
Fairland172634259
Kokomo - E. Vaile Ave.172634259
Avon167594456
Helmsburg165595058
Monrovia (Deactivated Jan 1, 2020)1666434 **54
Emporia172644460
Indpls-Harding St175654461
Hope169624659
Indpls - I-70 E170604157
Albany170594457
Indpls-Ft. Harrison176674362
Whitestown173664661
Noblesville-191st St171644560
South West
Inglefield166604657
Boonville170624458
Leopold163634958
Evansville-Buena Vista Rd168644759
St. Philips167614557
Dayville165594456
Plummer166624658
South East
Brownstown (Deactivated Jan 1, 2020)16560  ** 
Charlestown State Park171644861
New Albany173634861
** The value shown for this site does not represent a complete set of data for 2020 (74 days of valid data).

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.