Opportunity for Planning Assistance with Smart Growth Program
EPA's Smart Growth Implementation Assistance program helps communities that want to foster economic growth, protect environmental resources, enhance public health, and plan for development, but may lack the tools, resources, and information to achieve their goals.
There are four project categories. One of those, Community Resilience to Disasters and Climate Change, is most relevant to water and wastewater systems. These projects "should aim to develop planning principles and building design guidelines that ensure future development provides communities with better protection against storms, floods, and other natural disasters."
RCAP provides a nice overview of the program and links to relevant documentation. Please note this is not a grant program, but an opportunity for specific and direct technical assistance.