Return to main Clark County MeteoStar Monitoring web page
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 Monday, April 23, 2018.
measured in parts per billion
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
Clark County - all times are in PST
22  1 41403845462830374452606167706867 FEW 22  1 1 R DAQ
23  1 19202115121318283139525661656261 FEW 23  1 1 R DAQ
43  1 42484830161223 PM4250566161606264 FEW 43  1 1 R DAQ
71  1 48353026211626414653586264606163 FEW 71  1 1 R DAQ
73  1 57423535292327414348516064586365 FEW 73  1 1 R DAQ
75  1 34373225353335394552555965626264 FEW 75  1 1 R DAQ
298  1 55535656361623282540505763636465 FEW 298  1 1 R DAQ
540  1 37471952210213547576264616464 FEW 540  1 1 R DAQ
601  1 54525556535151495557586163636667 FEW 601  1 1 R DAQ
1019  1 56555550494244535356585762646769 FEW 1019  1 1 R DAQ
7772  1 40403738384649525354565756575656 FEW 7772  1 1 R DAQ
- 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.