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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 Monday, October 22, 2018.
measured in parts per billion
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00
Southwest - all times are in EST
28 149 FEW 28 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00
Valley - all times are in EST
10 97 FEW 10 1 R Virginia DEQ
17 130 FEW 17 1 R Virginia DEQ
25  1 98 FEW 25  1 1 R Virginia DEQ
26 00 FEW 26 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00
Blue Ridge - all times are in EST
24 118 FEW 24 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00
Piedmont - all times are in EST
13 1818 FEW 13 1 R Virginia DEQ
14 33 FEW 14 1 R Virginia DEQ
18 97 FEW 18 1 R Virginia DEQ
19 1512 FEW 19 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00
Tidewater - all times are in EST
30 2117 FEW 30 1 R Virginia DEQ
34 2424 FEW 34 1 R Virginia DEQ
35 65 FEW 35 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00
Northern - all times are in EST
11 1910 FEW 11 1 R Virginia DEQ
12 65 FEW 12 1 R Virginia DEQ
15 1517 FEW 15 1 R Virginia DEQ
16 87 FEW 16 1 R Virginia DEQ
20 177 FEW 20 1 R Virginia DEQ
21  2 3032 PM 21  2 1 R Oth Gov
23 116 FEW 23 1 R Virginia DEQ
27 42 FEW 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.