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Return to main Clark County MeteoStar Monitoring web page

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 Sunday, August 1, 2021.
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 7:00 8:00 9:00
Clark County - all times are in PST
24  1 3233283427253239455257606060605859605848 FEW NA 24  1 1 R DAQ
43  1 LIM LIM SPZ SPZ LIM LIM LIM LIM LIM LIM LIM LIM LIM LIM LIM LIM LIM LIM LIM LIM LIM NA 43  1 1 R DAQ
44  1 4035373937374152586276696671717170696567 FEW NA 44  1 1 R DAQ
71  1 2319232426222942505359565760636664666248 FEW NA 71  1 1 R DAQ
73  1 2726282928273944525458565760646667666149 FEW NA 73  1 1 R DAQ
75  1 1923272623243044495459605657605959626150 FEW NA 75  1 1 R DAQ
298  1 3840352228283345505863666976736968727065 FEW NA 298  1 1 R DAQ
299  1 2824252228303547566269707273686969696967 FEW NA 299  1 1 R DAQ
540  1 3240353321172440475561616364687070706658 FEW NA 540  1 1 R DAQ
602  1 5454544339364954586063626363746974767469 FEW NA 602  1 1 R DAQ
1019  1 3031262430293440505960596061616262625946 FEW NA 1019  1 1 R DAQ
2003  1 424142383935344153586569666768697169655654 NA 2003  1 1 R DAQ
7772  1 1925262419294040464847474950505153525047 FEW NA 7772  1 1 R DAQ
Notes:
- These sites are maintained and operated by Clark County Department of Air Quality.

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.

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.