Skip to Content

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 Friday, June 22, 2018.
measured in parts per billion
RegionCAMSMorningAfternoonCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00
Southwest - all times are in EST
28 1816137 PM7192829323435313432 FEW 28 1 R Virginia DEQ
RegionCAMSMorningAfternoonCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00
Valley - all times are in EST
10 26283336 PM37434549454241403937 NA 10 1 R Virginia DEQ
17 1013912 PM1024303924 PM29363432 NA 17 1 R Virginia DEQ
25  1 15121211 PM8131117252935323231 NA 25  1 1 R Virginia DEQ
26 24162920 PM35394141434140413936 FEW 26 1 R Virginia DEQ
RegionCAMSMorningAfternoonCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00
Blue Ridge - all times are in EST
24 171395 PM48614253232313332 FEW 24 1 R Virginia DEQ
RegionCAMSMorningAfternoonCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00
Piedmont - all times are in EST
13 32343636 PM32312725262833323432 FEW 13 1 R Virginia DEQ
14 19273131 PM25222018222426273136 NA 14 1 R Virginia DEQ
18 43404038 PM39343228283842403631 NA 18 1 R Virginia DEQ
19 36384040 PM33292622263137353634 NA 19 1 R Virginia DEQ
RegionCAMSMorningAfternoonCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00
Tidewater - all times are in EST
30 44444438 PM47464852484844444242 NA 30 1 R Virginia DEQ
34 26222223 PM26263234383633353532 NA 34 1 R Virginia DEQ
35 27262929 PM23232423243032323333 NA 35 1 R Virginia DEQ
RegionCAMSMorningAfternoonCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00
Northern - all times are in EST
11 47474746 PM39353637373429313029 NA 11 1 R Virginia DEQ
12 33414347 PM42424245434238373634 NA 12 1 R Virginia DEQ
15 42434141 PM44434336343431323535 NA 15 1 R Virginia DEQ
16 22324243 PM44444038383529343230 FEW 16 1 R Virginia DEQ
20 323133 PM PM32403836343433333232 NA 20 1 R Virginia DEQ
21  2 43474443484648 FEW LOST LOST LOST PM413937 NA 21  2 1 R Oth Gov
23 213034 PM PM49423935343335373334 NA 23 1 R Virginia DEQ
27 25384541 PM43424137363635363333 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.