The Hydropower Sustainability Tools define and measure sustainability in the hydropower sector. They provide a common language to allow governments, civil society, financial institutions and the hydropower sector to discuss and evaluate sustainability issues.

There are three complementary tools: the Hydropower Sustainability Guidelines on Good International Industry Practice (HGIIP), the Hydropower Sustainability Assessment Protocol (HSAP) and the Hydropower Sustainability ESG Gap Analysis Tool (HESG).