re: Mississippi, Louisiana border verging on an oil boom

They will likely need tens of thousands of barrels of water per well between drilling and completions (including fracking). If you own a water well and/or station within reasonable distance, there's money to be made.

Depending on costs and how much pressure they can get from a well source, they will either truck the water in or lay water lines up to the frack tank.

Out in New Mexico, middle of Permian Basin, that's how people are making money. The State and BLM own about 70-80 percent of the minerals and the surface out in the two hot counties. However, if you own water rights and a couple good water wells, you can make a killing that way.