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Nitrogen Dioxide Map

The map below shows all of the monitoring stations that have reported Nitrogen Dioxide measurements during the indicated time period. The map can show either the maximum or average measurement at each station. A red circle indicates that the measurement was dirtier than the selected standard, either the 10Green health standard, or other standards organizations' 1-hour standards (when they exist), while a green circle indicates that the measurement was at least as clean as the standard.

Showing measurement for using the health standard.

Climate Change Institute

An initiative of the Climate Change Institute at the University of Maine.