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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, October 18, 2017.
measured in parts per billion
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00
Southwest - all times are in EST
28 2221 FEW 28 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00
Valley - all times are in EST
10 4333 NA 10 1 R Virginia DEQ
17 0452 NA 17 1 R Virginia DEQ
25  1 7643 NA 25  1 1 R Virginia DEQ
26 0000 FEW 26 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00
Blue Ridge - all times are in EST
24 000 FEW NA 24 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00
Piedmont - all times are in EST
13 322 FEW NA 13 1 R Virginia DEQ
14 0111 NA 14 1 R Virginia DEQ
18 3322 NA 18 1 R Virginia DEQ
19 0000 NA 19 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00
Tidewater - all times are in EST
30 5553 FEW 30 1 R Virginia DEQ
34 141398 NA 34 1 R Virginia DEQ
35 0000 NA 35 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00
Northern - all times are in EST
11 0000 NA 11 1 R Virginia DEQ
12 9663 NA 12 1 R Virginia DEQ
15 11141513 NA 15 1 R Virginia DEQ
16 11854 FEW 16 1 R Virginia DEQ
20 5310 NA 20 1 R Virginia DEQ
21  2 34353536 NA 21  2 1 R Oth Gov
23 4321 NA 23 1 R Virginia DEQ
27 0000 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.