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Daily Maximum Eight-Hour Ozone Averages for February 2018

The table below lists the peak daily maximum eight-hour ozone concentrations measured in February 2018 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 SitePOCFebruary 2018POCMonitoring Site
Rural Retreat1373538373223313443242824362027353238NVNA1Rural Retreat
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
Albemarle High School1353434283728273634201827332122363134NVNA1Albemarle High School
Frederick Co. Public School Maint. Dept.130293329352234383361936382422343232NVNA1Frederick Co. Public School Maint. Dept.
Natural Bridge Station1373434313628303835181526342124373037NVNA1Natural Bridge Station
Harrisonburg VDOT1343334323723284234252034362425362936NVNA1Harrisonburg VDOT
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
Blue Ridge
Herman L. Horn Elementary School1343434323726313737101729391524363137NVNA1Herman L. Horn Elementary School
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
Charles City County1393433263526273737202027352722333334NVNA1Charles City County
Beach Road VDOT1423534283228243637242127322725293131NVNA1Beach Road VDOT
MSIC (MathScience Innovation Center)1373531263527293833131929362521333335NVNA1MSIC (MathScience Innovation Center)
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
NASA Langley Research Center1413434343731374039302431373022323835NVNA1NASA Langley Research Center
Tidewater Community College1413530373432393338322534372923313534NVNA1Tidewater Community College
VA Tech Agricultural Research Center1453836383637424042322433362925333736NVNA1VA Tech Agricultural Research Center
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
Aurora Hills Visitor Center1292931273622363835201733322221343231NVNA1Aurora Hills Visitor Center
Fredericksburg Geomagnetic Observatory1383233263525344035232032372824353536NVNA1Fredericksburg Geomagnetic Observatory
Lee District Park - Fairfax County1322932283724353935241735352622343332NVNA1Lee District Park - Fairfax County
Sumerduck - C. Phelps Wildlife Mgmt Area1363135323626334035262035342725323235NVNA1Sumerduck - C. Phelps Wildlife Mgmt Area
Ashburn - Broad Run High School1323133293724383929191938332024363332NVNA1Ashburn - Broad Run High School
Shenandoah National Park - Big Meadows1393438403935344142412843443627363537NVNA1Shenandoah National Park - Big Meadows
Long Park - Haymarket1323234303626364027201839332324363333NVNA1Long Park - Haymarket
Widewater Elem. School - Widewater1333133283724353933241833372623363534NVNA1Widewater 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.