We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Water Quality Surveillance and Response

Water Quality Surveillance and Response System Enhanced Security Monitoring Resources

These products support the design and implementation of Enhanced Security Monitoring (ESM), a component of a Surveillance and Response System (SRS).

You may need Adobe Reader to view files on this page. See EPA’s About PDF page to learn more.