 The systematic review of literature on energy water nexus in urban environments reveals that over 45% of studies utilized primary data sources, with most studies focusing on individual city scales and spanning 34 different countries. The analyzed literature highlights the importance of greenhouse gas emissions in life cycle analysis and identifies common practices for filling data gaps. Future research should focus on energy forewater in three countries where most studies are concentrated. This article was authored by Christopher M. Cheney, Lauren E. Excel and Ashlyn S. Stillwell.