The Humanitarian Innovation Fund (HIF) is looking for household water filters that are ready to be field tested in humanitarian emergency contexts. All relevant entries for this call will be included in a publicly available online catalogue of existing household water filters. Of these, up to five filters will be selected to be field tested in up to three different humanitarian emergency settings. The outcomes of the field testing will be included in a comparative review published by the Humanitarian Innovation Fund. This will publicly acknowledge the merits and performance of the filters across different humanitarian emergency settings. Deadline for Expression of Interest is February 17. Eligibility details and additional information can be found here.