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

This bill establishes a $100 million grant program within New Jersey's Department of Environmental Protection (DEP) to fund municipal planning and design for water infrastructure projects. Municipalities can apply for grants covering up to $2 million per project to plan drinking water, stormwater, or wastewater system upgrades - without requiring matching funds - prioritizing projects in overburdened communities. The grants specifically cover the upfront planning phase (not construction), helping municipalities later access federal and state financing for actual infrastructure work. The DEP must report annually on the program's effectiveness and develop application guidelines for eligibility.