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Current Carbon Monoxide 8-Hour Levels

The map below shows the current highest carbon monoxide 8-hour levels measured in parts per million (ppm) for each of the metropolitan or other areas across Virginia where carbon monoxide is measured by the Virginia DEQ. More detailed maps showing the current 8-hour carbon monoxide 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 23:00 EDT.

Key to Carbon Monoxide Highlight Colors:

The eight-hour color-coding is based on the eight-hour standard levels for carbon monoxide.
The table below shows the levels, color-coding, and suggested actions for the eight-hour standard.

Carbon Monoxide levels in this range are projected to be healthy based on the national eight-hour standard for Carbon Monoxide.
  • 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.