Hi Sophia,
The interactives gives you an overview of the exact location of the water sources. Some houses have groundwater borewells right outside their houses, and the river is within 5kms radius of the village. The newly added Google Earth overview of Pu Ngaol which allows you to measure distances. Here is the link
Please note that wherever specific information isn’t available it is okay to make thought out assumptions, based on data that is available. Hope that helps.
Cheers,
Sai