A Water Security Handbook (EPA)

Find at: https://www.epa.gov/sites/production/files/2015-06/documents/watersecurity_water_security_handbook_rptb_1.pdf

A Water Security Handbook: Planning for and Responding to Drinking Water Contamination Threats and Incidents

Note to Readers: The U.S. Environmental Protection Agency (EPA) prepared this guide to help you enhance the security of your water system. This document does not impose legally binding requirements on EPA, states, tribes, or the regulated community, and it may or may not apply to a particular situation, depending on the circumstances. 

EPA and state decision-makers retain the discretion to adopt approaches on a case-bycase basis that may differ from this guide where appropriate. Any decisions regarding a particular community water system should be made based on the applicable statutes and regulations. Therefore, interested parties are free to raise questions and objections about
the appropriateness of the application of this guide to a particular situation, and EPA will consider whether the recommendations or interpretations in this guide are appropriate in that situation based on the law and regulations. EPA may change this guide in the future.
To determine whether EPA has revised this guide or to obtain additional copies, contact the Safe Drinking Water Hotline at 1-800-426-4791 or visit the EPA’s Water Security website at www.epa.gov/watersecurity.