  Freshwater scarcity is a global problem that requires collective efforts
across all industry sectors. Nevertheless, a lack of access to operational
water footprint data bars many applications from exploring optimization
opportunities hidden within the temporal and spatial variations. To break this
barrier into research in water sustainability, we build a dataset for operation
direct water usage in the cooling systems and indirect water embedded in
electricity generation. Our dataset consists of the hourly water efficiency of
major U.S. cities and states from 2019 to 2023. We also offer cooling system
models that capture the impact of weather on water efficiency. We present a
preliminary analysis of our dataset and discuss three potential applications
that can benefit from it. Our dataset is publicly available at Open Science
Framework (OSF)
