Brattle led a data collection and modeling effort to forecast the diverse set of local water demands that exist in different parts of California. The work represented an important information source for understanding the spatial and temporal patterns of water demand which can be used to identify water supply needs. The findings of the study were also used to estimate the responsiveness of demand to changes in water rates, which can be used to understand the impacts of projected rate schedules and to infer the value of water to users.