Through a coordinated, statewide effort to identify priority water research needs in Idaho, the Spokane Valley–Rathdrum Prairie (SVRP) Aquifer emerged as a primary area of concern requiring additional research investment. Due to its unique geologic attributes, the SVRP Aquifer is a highly transmissive, fast-flowing system and is designated as a Sole Source Aquifer, providing drinking water for the Coeur d’Alene–Spokane region. These same characteristics that make the aquifer productive also increase its vulnerability to contamination from human activities. While existing regulatory designations help protect this critical resource, additional research is needed to better understand its hydrogeologic behavior, contaminant transport pathways, and susceptibility to future stressors. Three state water research priority projects have been identified for the 2025–2026 research team at the Idaho Water Resources Research Institute. This presentation will review ongoing research efforts on the SVRP Aquifer and highlight how these projects advance understanding of this groundwater system.