The report can be used by all wastewater systems, regardless of size or stage of completion of the systems vulnerability assessment. The suggested content and format can be modified to fit the specific needs of each wastewater system. Larger systems will likely use it as a starting point, because the complexity of their systems requires a more detailed ERP. Smaller wastewater systems can consider each section and use only what is relevant for their type, size, and complexity. Emergency response planning is an essential part of managing a wastewater system. The process helps wastewater system managers and staff explore responses to vulnerabilities, make improvements, and establish procedures to follow in an emergency. It also encourages people to form partnerships and better understand support capabilities. Preparing an ERP and practicing it can save lives, prevent illness, enhance system security, minimize property damage and environmental impact, and lessen liability.