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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.

In general, 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 Saturday, August 19, 2017.
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 4:00 5:00 6:00
Clark County - all times are in PST
22  1 3637372832302329404345474947484749 FEW NA 22  1 1 R DAQ
23  1 1516131413131119253641414343434543 FEW NA 23  1 1 R DAQ
43  1 2720191515161629394546504945434344 FEW NA 43  1 1 R DAQ
71  1 2120222219182335405255535353474745 FEW NA 71  1 1 R DAQ
73  1 2627272222201933414850484948454443 FEW NA 73  1 1 R DAQ
75  1 2729272221212533404955525453535148 FEW NA 75  1 1 R DAQ
298  1 4039342322181736364545444544444444 FEW NA 298  1 1 R DAQ
540  1 2727122121019334547474645454443 FEW NA 540  1 1 R DAQ
601  1 4443424342413338394041424342434344 FEW NA 601  1 1 R DAQ
1019  1 2925232826283134374042434141434242 FEW NA 1019  1 1 R DAQ
2002  1 1147571325354647474847454444 FEW NA 2002  1 1 R DAQ
7772  1 2926262524212227354045536356525149 FEW NA 7772  1 1 R DAQ
8000  2 LIM SPZ SPZ LIM LIM LIM LIM LIM LIM LIM LIM LIM LIM LIM LIM LIM LIM LIM NA 8000  2 4 N Other
Notes:
- These sites are maintained and operated by Clark County Department of Air Quality.
- These sites are maintained and operated by Paiute.

DAQ 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.
 N - Data from this instrument does not meet EPA quality assurance criteria and cannot be used for regulatory purposes.

PLEASE NOTE: This data has not been verified by the Clark County Department of Air Quality 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 Clark County Department of Air Quality 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.