Naturally occurring radioactive materials (NORM)
Include radionuclides that have been in the rocks and minerals of the earth's crust since it was created. They can also be produced by interactions between atoms in the atmosphere and cosmic rays.
Technologically enhanced naturally occurring radioactive materials (TENORM)
Are produced when activities such as uranium mining or sewage sludge treatment concentrate radioactive materials that occur naturally in ores, soils, water or other natural materials.
In 2018, the Colorado State legislature passed a bill (SB 245) that gave CDPHE the authority to promulgate rules for the safe management of TENORM. This page contains information on our current effort on developing TENORM regulation.