As of February 28th, 2023, NLM will discontinue the Wireless Information System for Emergency Responders (WISER), the website ( and WebWISER (, and the standalone applications for Windows PCs, iOS app, and Android app.
Other sources of Hazmat or Chemical, Biological, Radiological, Nuclear (CBRN) information are available with the following resources:

If you have questions or suggestions, please contact NLM Customer Service (