A summary of a lunchtime session held at UNC (October 2019). The goal of this lunch session was to appraise the “state of the evidence” on WASH in HCF following the first research meeting in 2016 and revisit which research topics which should be prioritized for future research. The meeting report from the 2016 research meeting, can be found at: https://www.washinhcf.org/resource/global-meeting2016-research-needs-london/