Return to main Clark County MeteoStar Monitoring web page
Return to main Clark County MeteoStar Monitoring web page

Current Ozone 1-Hour Levels

The map below shows the current highest ozone 1-hour levels measured in parts per billion (ppb) for each of the metropolitan or other areas across Clark County where ozone is measured by the DAQ. More detailed maps showing the current 1-hour ozone levels measured at each site in a particular area are available by clicking on the boxes on the map. These levels are based on data measured at the DAQ's continuous air monitoring stations and may include data from local governments and private monitoring networks.

The latest imagery available is for Friday June 23, 2017 13-14:00 PDT.

Key to Ozone Highlight Colors:

Hourly ozone levels have been mapped to a set of surrogate values based on custom 1-hour breakpoints.
The table below shows the levels, color-coding, and suggested actions for the 1-hour surrogate.

Ozone levels in this range are projected to be healthy based on the one-hour surrogate calculation for Ozone.
  • No health impacts are expected when levels are within this range.
  • No health impacts are expected when levels are within this range.
Ozone levels in this range are projected to be moderate based on the one-hour surrogate calculation for Ozone.
  • Unusually sensitive individuals may experience respiratory symptoms.
  • Unusually sensitive individuals may experience respiratory symptoms.
Ozone levels in this range are projected to be unhealthy for sensitive groups based on the one-hour surrogate calculation for Ozone.
  • Increasing likelihood of respiratory symptoms and breathing discomfort in active children and adults and people with respiratory disease, such as asthma.
  • Increasing likelihood of respiratory symptoms and breathing discomfort in active children and adults and people with respiratory disease, such as asthma.

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.