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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 28, 2017.
measured in parts per billion
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00
Southwest - all times are in EST
28 44442 FEW 28 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00
Valley - all times are in EST
10 171513106 NA 10 1 R Virginia DEQ
17 171714155 NA 17 1 R Virginia DEQ
25  1 201613107 NA 25  1 1 R Virginia DEQ
26 00000 FEW 26 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00
Blue Ridge - all times are in EST
24 111011107 FEW 24 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00
Piedmont - all times are in EST
13 2425262514 FEW 13 1 R Virginia DEQ
14 141314117 NA 14 1 R Virginia DEQ
18 181515128 NA 18 1 R Virginia DEQ
19 3027242016 NA 19 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00
Tidewater - all times are in EST
30 2529343331 FEW 30 1 R Virginia DEQ
34 3331353433 NA 34 1 R Virginia DEQ
35 48151620 FEW 35 1 R Virginia DEQ
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00
Northern - all times are in EST
11 272218159 NA 11 1 R Virginia DEQ
12 2519191511 NA 12 1 R Virginia DEQ
15 2826222218 NA 15 1 R Virginia DEQ
16 20151375 FEW 16 1 R Virginia DEQ
20 2420151617 NA 20 1 R Virginia DEQ
21  2 3433333333 NA 21  2 1 R Oth Gov
23 242117149 NA 23 1 R Virginia DEQ
27 15111086 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.