Nitrogen Oxide (NOx) Emission Trends

Nitrogen oxides, or NOx, is the generic term for a group of highly reactive gases, all of which contain nitrogen and oxygen in varying amounts. To learn more about NOx and the human health and environmental effects of NOx, visit DNR’s website at Oxides of Nitrogen.

As the chart below shows, ECPP participants have reduced their NOx emissions to less than 40% of baseline (year 2000) levels in the course of six years. Over the same time period, NOx emissions from all other stationary sources in Wisconsin have also declined, but the decline has not been as dramatic.