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Ozone Hourly Averages

Ozone is a form of oxygen with three atoms instead of the usual two atoms. It is a photochemical oxidant and, at ground level, is the main component of smog. Unlike other gaseous pollutants, ozone is not emitted directly into the atmosphere. Instead, it is created in the atmosphere by the action of sunlight on volatile organic compounds and nitrogen oxides.

Higher levels of ozone usually occur on sunny days with light winds, primarily from March through October. An ozone exceedance day is counted if the measured eight-hour average ozone concentration exceeds the standards.

Use the controls below to select a different date or parameter and to control cell highlighting based on measured Ozone levels. Click on the Generate Report button once you have made your selections.

Click on the Plot Data button once the tabular report has been generated to open a separate window containing data plots.
Select a date: Time Format: Select a Parameter:
   
Ozone Highlights:  Moderate   Unhealthy for Sensitives   Unhealthy   Very Unhealthy  
Highlight validated data (Validated data has been manually reviewed by a data validator)
Select a Region:

Ozone Hourly Averages for Wednesday, June 26, 2019.
measured in parts per billion
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00
Southwest - all times are in EST
28 109 FEW NA 28 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00
Valley - all times are in EST
10 1817 FEW NA 10 1 R Virginia DEQ
17 2519 FEW NA 17 1 R Virginia DEQ
25  1 118 FEW NA 25  1 1 R Virginia DEQ
26 11 FEW NA 26 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00
Blue Ridge - all times are in EST
24 1816 FEW NA 24 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00
Piedmont - all times are in EST
13 129 FEW NA 13 1 R Virginia DEQ
14 75 FEW NA 14 1 R Virginia DEQ
18 45 FEW NA 18 1 R Virginia DEQ
19 2021 FEW NA 19 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00
Tidewater - all times are in EST
30 1918 FEW NA 30 1 R Virginia DEQ
34 2521 FEW NA 34 1 R Virginia DEQ
35 32 FEW NA 35 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00
Northern - all times are in EST
11 3642 FEW NA 11 1 R Virginia DEQ
12 1623 FEW NA 12 1 R Virginia DEQ
15 3339 FEW NA 15 1 R Virginia DEQ
16 76 FEW NA 16 1 R Virginia DEQ
20 3940 FEW NA 20 1 R Virginia DEQ
21  2 47 FEW NA NA 21  2 1 R Oth Gov
23 3337 FEW NA 23 1 R Virginia DEQ
27 3838 FEW NA 27 1 R Virginia DEQ
Notes:
- These sites are maintained and operated by USDA Forest Service.
- These sites are maintained and operated by the National Park Service.

Virginia DEQ does not certify the validity or quality of data it hosts from other monitoring entities.
Maximum values for the day are bold within the table. Minimum values are bold italic.
 R - Data from this instrument meets EPA quality assurance criteria for regulatory purposes.

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.