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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 Virginia where ozone is measured by the Virginia DEQ. 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 Virginia DEQ's continuous air monitoring stations and may include data from local governments and private monitoring networks.

The latest imagery available is for Thursday August 17, 2017 21-22:00 EDT.

Key to Ozone Highlight Colors:

Hourly ozone levels have been mapped to a surrogate 8-hour average.
The table below shows the levels, color-coding, and suggested actions for the 8-hour surrogate.

There is no current measurement for this area or site.
Ozone levels in this range are projected to be healthy based on the eight-hour surrogate calculation for Ozone.
  • No health impacts are expected when levels are within this range.
  • No special actions are required when levels are within this range.

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.