Establishes municipal water infrastructure planning and design project grant program in DEP; appropriates $100 million.

This bill creates a $100 million grant program within New Jersey's Department of Environmental Protection (DEP) to help municipalities cover costs for planning and designing water infrastructure projects. Municipalities can apply for grants up to $2 million per project to fund planning for drinking water, stormwater, or wastewater systems that later qualify for state/federal funding under the New Jersey Environmental Infrastructure Financing Program. The program prioritizes projects in "overburdened communities" (as defined by state law), requires no matching funds from applicants, and mandates annual DEP reports to the Governor and Legislature on program effectiveness. The grants specifically target the upfront planning phase, removing financial barriers to accessing larger infrastructure funding for water system upgrades.