Tap water unless you live in a few places in the country were the tap water might kill you. American Falls and Pocatello, ID, the Love Canal, Flint, MI, apparently Kentucky... .
But, in some places, the rainwater isn't safe either.... the eastern third of the United States, and southeastern Canada.
Distilled water is death to plants - lack of minerals. Bottled water is just out of someone else's faucet.
Dasy
