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Daily Maximum Eight-Hour Ozone Averages for June 2017

The table below lists the peak daily maximum eight-hour ozone concentrations measured in June 2017 in each community where the Virginia DEQ 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 SitePOCJune 2017POCMonitoring Site
Rural Retreat1525659523851424050565042384246373533334952283139424545NA1Rural Retreat
AreaMonitoring SitePOCJune 2017POCMonitoring Site
Albemarle High School1515659594046364649515148444954393534294552452340424744NA1Albemarle High School
Frederick Co. Public School Maint. Dept.1504548554837245050554847495853394041324852452044444541NA1Frederick Co. Public School Maint. Dept.
Natural Bridge Station14956555135433237474849403641NV313234284147382039424144NA1Natural Bridge Station
Harrisonburg VDOT153NV56563943364350555253535550374241274852501944444540NA1Harrisonburg VDOT
AreaMonitoring SitePOCJune 2017POCMonitoring Site
Blue Ridge
Herman L. Horn Elementary School1525764563845373648555353424846343835274551422342424645NA1Herman L. Horn Elementary School
AreaMonitoring SitePOCJune 2017POCMonitoring Site
Charles City County156625556314935NV4856545750NANV432627273441472236424947NA1Charles City County
Beach Road VDOT1535553543046333943565049405658422429292639332237384644NA1Beach Road VDOT
MSIC (MathScience Innovation Center)1566156593549354549565662545752573032323947492642455248NA1MSIC (MathScience Innovation Center)
AreaMonitoring SitePOCJune 2017POCMonitoring Site
NASA Langley Research Center1596458613251424252535449526849592532303837392438475547NA1NASA Langley Research Center
Tidewater Community College1546659602852424347545450495447471930273535362437465951NA1Tidewater Community College
VA Tech Agricultural Research Center1536556592154383846535249505553382231313434292438425049NA1VA Tech Agricultural Research Center
AreaMonitoring SitePOCJune 2017POCMonitoring Site
Aurora Hills Visitor Center1585656604943325254635860637252563841355457552550505146NA1Aurora Hills Visitor Center
Fredericksburg Geomagnetic Observatory1525755563344364849505156476647353234294038402243434844NA1Fredericksburg Geomagnetic Observatory
Lee District Park - Fairfax County1555356544443335352585661597247443236324749472048474747NA1Lee District Park - Fairfax County
Sumerduck - C. Phelps Wildlife Mgmt Area1464750493639324945524642425245312834264040321940414541NA1Sumerduck - C. Phelps Wildlife Mgmt Area
Ashburn - Broad Run High School1575554594842305654605450586764483943345359512449495047NA1Ashburn - Broad Run High School
Shenandoah National Park - Big Meadows1555658575049354651545248515446454139384750462747464542NA1Shenandoah National Park - Big Meadows
Long Park - Haymarket15655556046423159526154NV546560403742345152462347485046NA1Long Park - Haymarket
Widewater Elem. School - Widewater1515453543843355250514949476348413336304441432145455044NA1Widewater Elem. School - Widewater
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 Not Defined
401 - 500 0.505 - 0.604 Not Defined
500+ Not Defined Not Defined

PLEASE NOTE: This data has not been verified by the Virginia DEQ 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 Virginia DEQ 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.