I support Annemarieke's views that the indicators need to be realistic and measurable. It doesn't look like with this wish list (though I assume the "long list" is meant to create debate and to be narrowed down).
In addition, I think the WASH sector should fully focus on WASH at the community/ household level and hence set only targets for household/ communities. WASH in Schools issues need to be tackled by the Education Sector as part of Quality Education/ Child Friendly Schools etc. Without the Education Sector taking the lead, it isn't gonna be sustainable. Therefore, I would prefer to see WASH in Schools targets as part of Education Sector targets. And because children are part of homes, communities and schools, the WASH Sector and Education Sector should coordinate their efforts AND targets, so indeed improvements at household/ community level and in schools go hand in hand.