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Peak Daily One-Hour Ozone Averages for February 2019

The table below lists the peak daily one-hour ozone concentrations measured in February 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 SitePOCFebruary 2019POCMonitoring Site
12345678910111213141516171819
North West
Hammond-141st St1232826282923303129212236362932393243351Hammond-141st St
Ogden Dunes13133292925NANANANANANANANANANANANANANA1Ogden Dunes
Michigan City-W. Michigan Blvd1343629313420333335272941413138413543401Michigan City-W. Michigan Blvd
Valparaiso1333930283019343537283142433437423544421Valparaiso
LaPorte-E. Lincolnway1323927272718313235263039393136393443411LaPorte-E. Lincolnway
AreaMonitoring SitePOCFebruary 2019POCMonitoring Site
12345678910111213141516171819
North Central
South Bend-Shields Dr1333830282615303336273137393136383543441South Bend-Shields Dr
Bristol1324029282216293437263037392937363443411Bristol
Potato Creek State Park1354434342616323436293340413436393645461Potato Creek State Park
Granger-Beckley St13341NANANA15293737263135393038393643431Granger-Beckley St
AreaMonitoring SitePOCFebruary 2019POCMonitoring Site
12345678910111213141516171819
North East
Fort Wayne-Beacon St1303538282016283434253240403235353541401Fort Wayne-Beacon St
Leo HS1374042322319293638283444433739383844461Leo HS
Roanoke Elem. School1NANANA261813303329NANANA403636323339361Roanoke Elem. School
AreaMonitoring SitePOCFebruary 2019POCMonitoring Site
12345678910111213141516171819
West Central
Terre Haute-Lafayette Ave126264230197303535201135394439372521331Terre Haute-Lafayette Ave
Flora1323340372211323536262743443938373142431Flora
Sandcut130284430208313635231536404537372635381Sandcut
West Union127284128186313533251636394338362538371West Union
AreaMonitoring SitePOCFebruary 2019POCMonitoring Site
12345678910111213141516171819
East Central
Emporia129314138189273434271735413837342841391Emporia
Albany1293843381713273332231939413837332941391Albany
Indpls-Washington Park123294433175283536201233413638372643381Indpls-Washington Park
Indpls-Harding St12024393315221313520103039413423NANA431Indpls-Harding St
Indpls-Ft. Harrison125273729163243232191130363532312537351Indpls-Ft. Harrison
Monrovia1283445411911283536232034394536352737391Monrovia
Whitestown129314232217303435221536403936352842381Whitestown
Avon12332442919NANA343321834404438352340331Avon
Fairland129214636167273535261532394237342639381Fairland
Noblesville-191st St129314433196293535211236414138342741381Noblesville-191st St
Hope1292346341711303636271832394338362638401Hope
Indpls - I-70 E122273828134252934211125363331282529341Indpls - I-70 E
Kokomo - E. Vaile Ave.1293442332112313535NANANANA383836NANA421Kokomo - E. Vaile Ave.
Helmsburg1293047341612303636231434404539382635411Helmsburg
AreaMonitoring SitePOCFebruary 2019POCMonitoring Site
12345678910111213141516171819
South West
Boonville1303743341219343735252338394337342535371Boonville
Evansville-Buena Vista Rd1303542301124323734212138404238322937371Evansville-Buena Vista Rd
Inglefield1293441301117313634222137384336332636361Inglefield
St. Philips1303544321127353634232138394437322737361St. Philips
Leopold1304247371920313632252333384436352533361Leopold
Dayville1343641291128323633232137404336332836361Dayville
Plummer1323046351712313535NA1934404538392639411Plummer
AreaMonitoring SitePOCFebruary 2019POCMonitoring Site
12345678910111213141516171819
South East
New Albany1243647211823303632211332374138302432391New Albany
Charlestown State Park1293249361524303633242131383938312631401Charlestown State Park
Brownstown1262444391618293533251731404438382436391Brownstown
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.