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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, 2015, 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
201520162017
as of
12:07 pm EST
4/30/2017
North West
Michigan City-W. Michigan Blvd167 * 56 ** 
Ogden Dunes166 *70 *53 **63
Gary-IITRI164 *70 *5663
Valparaiso160 *7156 **62
LaPorte-E. Lincolnway161 *68 *55 **61
Hammond-141st St160 *68 *47 **58
North Central
Granger-Beckley St164 *7156 **63
Bristol158 *7252 **60
Potato Creek State Park158 *69 *58 **61
South Bend-Shields Dr166 *724862
North East
Leo HS162 *66 *55 **61
Roanoke Elem. School154 *66 *53 **57
Fort Wayne-Beacon St159 *69 *5460
West Central
Flora164 *66 *56 **62
Sandcut162 *67 *57 **62
Terre Haute-Lafayette Ave164 *69 *5863
West Union164 *66 *55 **61
East Central
Indpls-Washington Park167705363
Fairland159 *65 *57 **60
Trafalgar163 *62 *57 **60
Avon155 *68 *54 **59
Indpls-E.16th St162 *68 *56 **62
Helmsburg162 *63 *59 **61
Monrovia163 *65 *51 **59
Emporia154 *64 *54 **57
Indpls-Harding St161 *69 *53 **61
Hope166 *7156 **64
Fortville (Deactivated Oct 1, 2015)162 *   
Indpls - I-70 E164685060
Albany158 *67 *56 **60
Indpls-Ft. Harrison169 *7356 **66
Whitestown164 *70 *52 **62
Noblesville-191st St163 *69 *54 **62
South West
Inglefield168 *70 *55 **64
Boonville169 *70 *55 **64
Leopold167 *69 *57 **64
Evansville-Buena Vista Rd172725466
Lynnville162 *7251 **61
St. Philips167 *68 *55 **63
Plummer167 *69 *57 **64
Dayville165 *7152 **62
South East
Brownstown164 *70 *54 **62
Charlestown State Park174725767
New Albany165 *7358 **65
* The value shown for this site does not represent an entire year's worth of data (274 days of valid data).
** The value shown for this site does not represent a complete set of data for 2017 (89 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.