These wastewater/stormwater utilities guidelines recommend physical and electronic security measures for physical protection systems to protect against identified adversaries,referred to as the design basis threats (DBTs), with specified motivation, tools, equipment, and weapons. Additional requirements and security equipment may be necessary to defend against threats with greater capabilities.
ANSI/ASCE/EWRI 57-2011 history
2011ANSI/ASCE/EWRI 57-2011 Guidelines for the Physical Security of Wastewater/Stormwater Utilities