Helping destitute people get water and sanitation seems like giving to society. It's very typical and likely very effective foreign aid. Probably it got picked here because of "Gender Aware", as if sanitation having gender-related issues is somehow weird.

Your link to the blood pressure reduction project is linking to something totally else, but in general such approaches seem to have some scientific backing. Improving public health seems like benefiting the society.

I wonder how many engineers really benefit society with their work, and how many even actively harm it.

https://bmccardiovascdisord.biomedcentral.com/articles/10.11...