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Daily Maximum Eight-Hour Ozone Averages for March 2017

The table below lists the peak daily maximum eight-hour ozone concentrations measured in March 2017 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 SitePOCMarch 2017POCMonitoring Site
123456789101112131415161718192021222324252627
North West
Hammond-141st St1333436353732394138393834NANV4039282434334342344526NANA1Hammond-141st St
Ogden Dunes13739403241354142413940363840414027263632424437492731181Ogden Dunes
Michigan City-W. Michigan Blvd13939433644374142434143403941433935313734444640532937191Michigan City-W. Michigan Blvd
Valparaiso13637393445384444404041393942404731243728444339532635201Valparaiso
Gary-IITRI13039403542353942434042374143414427263832444737502932191Gary-IITRI
LaPorte-E. Lincolnway1NV39423443354042384040383541414231253427434137492533181LaPorte-E. Lincolnway
AreaMonitoring SitePOCMarch 2017POCMonitoring Site
123456789101112131415161718192021222324252627
North Central
South Bend-Shields Dr13336393440373638323534333636353327193125393634452728151South Bend-Shields Dr
Bristol137394234403538NANANV39393539404128233326423936482730191Bristol
Potato Creek State Park13741433644394242404041403942434735263631444439522937211Potato Creek State Park
Granger-Beckley St13841443741384043404042404141434331283830454439533033181Granger-Beckley St
AreaMonitoring SitePOCMarch 2017POCMonitoring Site
123456789101112131415161718192021222324252627
North East
Fort Wayne-Beacon St13638433542383944404141413541414428223433454239523039251Fort Wayne-Beacon St
Leo HS13840443741394145424142423742434632253433464340543137261Leo HS
Roanoke Elem. School13737423443393943393941413540404323223730444039503840261Roanoke Elem. School
AreaMonitoring SitePOCMarch 2017POCMonitoring Site
123456789101112131415161718192021222324252627
West Central
Terre Haute-Lafayette Ave13839404250394247484037433441414733313835434141484637221Terre Haute-Lafayette Ave
Flora1343237NANANA4144423840433441394529283626444339494242261Flora
Sandcut13738394249394246473936413439414636283734424141474537231Sandcut
West Union13838404148404146474038423440434630303740424237464635221West Union
AreaMonitoring SitePOCMarch 2017POCMonitoring Site
123456789101112131415161718192021222324252627
East Central
Indpls-E.16th St1NANANANANANV3745403840423140404333283624434142514843281Indpls-E.16th St
Emporia1NA35373648393844433939413340394333263332444042514944291Emporia
Albany136NVNA3246414043414040373341414634253233453843534946301Albany
Indpls-Washington Park13633373446393644403738413340404129273522434140484640241Indpls-Washington Park
Indpls-Harding St13533353548373442393538413137374128253523414042474439241Indpls-Harding St
Indpls-Ft. Harrison13634383448393745413839423440394332283624444141514842261Indpls-Ft. Harrison
Monrovia13534353447403742413635393037384335253526403742464339141Monrovia
Trafalgar1NANA40385244414750393943324141473229352945424551NVNANA1Trafalgar
Whitestown13432383648373743393739423341404529273723414138474241231Whitestown
Avon138353833484140NANANV38403139404429283625434042494441251Avon
Fairland13836383751414047423839423340404735283529434145525144291Fairland
Noblesville-191st St1NA36383650414046433940413441404531283525444142524841251Noblesville-191st St
Hope1NV39393751424147493939423341414634293332464244505042301Hope
Indpls - I-70 E13124263444383333262728372729283626213319303238444339211Indpls - I-70 E
Helmsburg1NANA394052424048514139433140424731293631464244504742241Helmsburg
AreaMonitoring SitePOCMarch 2017POCMonitoring Site
123456789101112131415161718192021222324252627
South West
Boonville13941404648424547524241442942434534353744464642464740301Boonville
Evansville-Buena Vista Rd13840374548414446544038432941424633353745444434454837311Evansville-Buena Vista Rd
Lynnville1NANANANANANANANANV3937402739414132323343404338444335231Lynnville
Inglefield1NANV394649414346543938422941414534343746424437474837321Inglefield
St. Philips13841404748434547554240423042434635363744434539474937371St. Philips
Leopold1NANANV4752444247564139433142424636343845454446504843291Leopold
Dayville13840394547384446544040422841424230353642434437454339301Dayville
Plummer1NANANANANANV4348514241443443444738313844484546504939241Plummer
AreaMonitoring SitePOCMarch 2017POCMonitoring Site
123456789101112131415161718192021222324252627
South East
New Albany13840394153424047554241432740424427323432453940524941131New Albany
Charlestown State Park13740404451434147534341413241424534323439464046535040201Charlestown State Park
Brownstown13941404150434347524238423142NANANANANANA464242484741221Brownstown
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.