Tox-App lets users search for industrial facilities that most recently reported releasing certain chemicals into the environment to the US EPA TRI program. Tox-App was developed by National Library of Medicine (NLM) interns and is based on the web-based NLM TOXMAP (https://toxmap.nlm.nih.gov). This version of Tox-App provides some of the basic TOXMAP functions, including the ability to search for reporting facilities, or browse for these facilities by chemical, state, or county.