Colorado TRI Reporting 

In Colorado, we produce electricity using coal, natural gas, water, wind and solar energy for more than 1.3 million electricity customers in the state.

Of the TRI releases we report, the majority are chemicals that come from coal. This fuel naturally contains trace amounts (in the parts-per-million range) of these elements: barium, copper, lead, manganese, mercury, zinc, chloride (which forms hydrochloric acid) and fluoride (which forms hydrogen fluoride). Coal composition and mineralogy vary, depending upon where the coal is mined. Our facilities may report different chemicals and quantities because they burn different quantities of coal from a variety of mines. Subsequently, our TRI releases may vary from year to year.

In general, releases were up in 2006 because more coal was burned than in 2005.

Summary of Toxic Release Inventory (TRI) Reportable Releases:

Percent of Total Release

Numbers for individual plants in Colorado can be found using the links below.