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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 Tuesday, December 11, 2018.
measured in parts per billion
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00
Southwest - all times are in EST
28 192123292724 FEW 28 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00
Valley - all times are in EST
10 454423 NA 10 1 R Virginia DEQ
17 3818532 NA 17 1 R Virginia DEQ
25  1 181517151210 NA 25  1 1 R Virginia DEQ
26 000000 FEW 26 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00
Blue Ridge - all times are in EST
24 734462 FEW 24 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00
Piedmont - all times are in EST
14 654367 NA 14 1 R Virginia DEQ
18 771110911 NA 18 1 R Virginia DEQ
19 0001412 NA 19 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00
Tidewater - all times are in EST
30 242423222120 FEW 30 1 R Virginia DEQ
34 222220201817 NA 34 1 R Virginia DEQ
35 232322212019 FEW 35 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00
Northern - all times are in EST
11 6710811 NA 11 1 R Virginia DEQ
12 81011121516 NA 12 1 R Virginia DEQ
15 FEW129 FEW33 NA 15 1 R Virginia DEQ
16 131817141110 FEW 16 1 R Virginia DEQ
20 400010 NA 20 1 R Virginia DEQ
21  2 333436363637 NA 21  2 1 R Oth Gov
23 643463 NA 23 1 R Virginia DEQ
27 000000 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.