This technical brief sums up the work being conducted by the International Water Association (IWA) and The Nature Conservancy (TNC) with the aim of advancing sustainable catchment management through nature-based solutions (NBS). The initiative aims to contribute new insights to the body of knowledge against which NBS can be assessed, a critical element for mainstreaming these practices. The partnership also aims to support those water utilities and water regulators looking to harness nature as a means of ensuring water security. Learn more here.