In Idaho, domestic wells don't require you to have water rights. However, a domestic well can't be used to irrigate more than 1/2 acre, a house and garden. There's a farm near me that a developer wants to divide into 240 1-acre plots for housing. Each house will have it's own well. That's a huge amount of water to be pulling out of the ground and could require neighboring homeowners to have to deepen their wells. The plan is being fought and I can't guess how it will shake out. The land has irrigation water rights but often when a farm is subdivided, the developers sell off the water rights and the new home buyers don't get it.
