The dishwasher etc is not part of producing the drinking water. It's just a way of consuming it. But I get your point about the entire construction of the well

The dishwasher etc is not part of producing the drinking water. It's just a way of consuming it. But I get your point about the entire construction of the well. And the drilling rig, say it drills 500 wells in its life span. Then you have to consider the water that went in to building the rig, divided by 500. And the water that goes in to disassembly and recycling. And the water that went in to building the drill rig factory. And that went into building the tools that were used to build the factory. Etc.