Water supply by tankers in Maharashtra

When a village gets water supplied by tanker, what are all processes that have taken place? Where can I get data about tankers?

Who selects the villages for water supply by tankers? How are they selected? How is the number of tankers for a particular village is decided? What is the water storage capacity of the tanker? At what cost each tanker is available? Who bears the cost? Where can I get tehsil wise data about number of tankers each year?