With this global mapping exercise, we attempted to identify catchments with stronger need and potential of Collective Action for Water Stewardship. On the “need” side we considered a selection of water and biodiversity risk layers from the WWF Risk Filter Suite. On the “potential” side we considered economic factors such as value of crop production, density of business facilities (assets), and potential for cross-industry collaboration. The result is a global map (or a shapefile) of collective action opportunities, highlighting 350 catchments, across 100 river basins and 7 regions of the world, where multiple NGOs and the private sector shall work together to accelerate collective action for water stewardship. See the interactive map here. This repository hosts all outputs as well as the input data of the mapping exercise. For transparency, reproducibility, as well as for future enhancements, the code is publicly available at https://github.com/rafaexx/collective_action_opportunities Final outputs are basically the shapefiles in output/summarise_geo/shp/* as well as the list of basins in output/summarise_geo/3_prioritization/hybas6_list_basins_collective_action.xlsx For more details see part III of the report Unpacking Collective Action in Water Stewardship: Shared Solutions for Shared Water Challenges.