The remaining 16% was released to the air, water or placed in some type of land disposal. Most of these releases are subject to a variety of regulatory requirements designed to limit human and environmental harm.
The 2014 TRI data show a 6 percent decrease in total disposal or other releases to the environment from 2013 to 2014. Notably, air releases from industrial facilities decreased by 4 percent during this period, mainly due to decreases from chemical manufacturing facilities and electric utilities. Air releases have decreased 55% since 2003.
TRI data are submitted annually to EPA, states, and tribes by facilities in industry sectors such as manufacturing, metal mining, electric utilities, and commercial hazardous waste. Under the Emergency Planning and Community Right-to-Know Act (EPCRA), facilities must report their toxic chemical releases for the prior year to EPA by July 1 of each year. The Pollution Prevention Act of 1990 also requires facilities to submit information on pollution prevention and other waste management activities related to TRI chemicals.