The custodians of SDG indicators 1.4.2 (UN-Habitat and the World Bank) and 5.a.1 (FAO) have joined forces to develop a standardized and succinct survey instrument designed to collect the essential data for computation of both indicators simultaneously. As the data collection requirements for each indicator largely overlap, great gains in efficiency are possible by implementing a joint module in existing survey questionnaires.This document aims to facilitate the successful, efficient, and crosscountry comparable data collection for computation of SDG indicators 1.4.2 and 5.a.1 in line with the methodologies approved by the IAEG-SDGs. The survey instrument discussed in this document was designed with an eye for the integration of essential questions for both indicators into existing survey instruments, with the possibility of stand-alone implementation. Use of the proposed module encourages the standardization of indicator definitions and data comparability across countries and over time.

The United Nations World Water Development Report, Leaving no one behind, launched 19 March 2019 during the 40th session of the United Nations Human Rights Council (UNHRC), and in conjunction to the World Water Day, demonstrates how improvements in water resources management and access to water supply and sanitation services are essential to addressing various social and economic inequities, such that ‘no one is left behind’ when it comes to enjoying the multiple benefits and opportunities that water provides.