Understanding both the available supply of water and the current and future demand is critical to making informed land use, transportation, and infrastructure investment decisions. Today several different state agencies collect and analyze information about the use and condition of our region’s drinking water supply, which can result in redundancy and gaps in planning and responsibilities. A properly funded and coordinated approach could enhance regional understanding of and planning for water supply and demand. Working together, land use planners and water utility managers can align local planning efforts with current and future water supply constraints. Assessing forecasted demand scenarios in the context of available water supply and infrastructure capacity can inform regional and local planners about the sufficiency of water supply and encourage actions that conserve water, protect supply, and/or pursue alternative drinking water sources. In particular, local water demand forecasts can help bridge land use, transportation, and municipal finance and asset management decisions as development patterns affect water use and also long-term infrastructure maintenance costs. Avoiding expensive capacity expansions can help maintain municipal fiscal stability but requires coordination across municipal departments to reduce water demand. Action 1 Coordinate community water supplier reporting requirements and improve data sharing across agencies and partners. Implementers The state Action 2 Fund critical surface and groundwater supply research and expand groundwater quality and quantity monitoring. Implementers The U.S. Geological Survey, state, and counties Action 3 Regularly update the regional water demand forecast in conjunction with socioeconomic forecast updates and incorporate projected impacts of climate change. Implementers CMAP Action 4 Conduct local water demand forecasts and integrate demand management and conservation strategies in land use and infrastructure planning efforts. Implementers Local governments and other community water suppliers Action 5 Protect the quantity and quality of water supply sources through open space and recharge area protection, as well as other water pollution control measures. Implementers Local governments Action 6 Provide technical assistance to communities to incorporate water supply and demand management strategies in local plans, ordinances, and development review processes. Implementers CMAP and partners Action 7 Consider long-term water availability and infrastructure costs in decisions about large scale water users and the expansion of drinking water services in new development. Implementers Local governments Action 8 Research and develop a process to evaluate, avoid, and minimize the direct and indirect water resource impacts of regionally significant transportation projects and of the development they induce in locations facing water supply constraints. Implementers CMAP, local governments, and transportation agencies