I catch rainwater off the roofs: barn, farmhouse, & workshop building. The barn fills a concrete horse trough 6'x8' x30" deep and never gets used much. It turns green in the hot weather... The house feeds into a 7000 gallon underground concrete cistern, which feeds a small sink with handpump in the house. I heat water with wood. This last year I hauled drinking water in 2x 50 gallon plastic food grade drums, as well as in 2 liter soda bottles. I have an Amish built farm.