The Emergency Planning and Community Right-to-Know Act (EPCRA) was passed by Congress in 1986. It was included as Title III of the U.S. Environmental Protection Agency’s Superfund Amendments and Reauthorization Act (SARA) and is usually referred to as “SARA Title III”.  The act provides for the collection of and access to information about the use, storage, production and release of hazardous chemicals, to help inform emergency planners/responders and the public.  
Submission of Tier II form is required under Section 312 of EPCRA. The purpose of this form is to provide State and local officials and the public with information on the general hazard types and locations of hazardous chemicals present at your facility during the previous calendar year. The Tier II Report is due annually by March 1. 
The TRI tracks the management of certain toxic chemicals that may pose a threat to human health and the environment. In 2013, Colorado had 238 TRI reporting facilities. All TRI reporting must be submitted electronically through the Environmental Protection Agency (EPA) using TRI-MEweb.  The TRI Report is due annually by July 1.