This is an uncurated collection of 166 desk notes and field notes on water-related solutions from around the world. These range from technical solutions for harvesting water, to citizen science initiatives for measuring the quality of water, to roofing materials, to hydroponics systems. Each note includes a short description of the solution, geographic information of where it was mapped, a number of thematic area and SDG tags, and (in most cases) one or several images that illustrate the solution.  Note this collection is shared primarily for inspiration. The solutions showcased here are not endorsed in any way by UNDP.