A Surveillance and Response System (SRS) supports monitoring and management of distribution system water quality.  Drinking water utilities can use an SRS to detect and respond to water quality incidents. 

This diagram shows the four surveillance components and two response components of an SRS.

• Surveillance and Response Fact Sheet (PDF)(2 pp, 996 K)
  Provides a brief introduction to SRS practices for improving distribution system surveillance and response.
• Water Quality Surveillance and Response System Primer (PDF)(14 pp, 808 K)
  Provides utilities with a foundation for applying technical guidance and tools to implement an SRS.