The north of Nigeria is liable to desert encroachment from the Sahara desert with water scarcity always on the increase. Most rural dwellers are nomads and farmers with many farm animals to provide water for. Currently there are villages with access to any clean water at all. The good news is that underground water is available, however, the mechanism to drill and avail such clean water requires money. Those villager cannot afford on their own without external help. As long as this demand is not met, they will be liable to poverty and diseases such as typhoid from unclean water. 

With available clean water for people, animals can have greater access to other sources of water supply was there would be lesser competition with people.