"Well, now—" I scratched head and grinned. "We’re careful; we keep our sewage and garbage and sterilize and use it. Never put a drop back into city system. But—don’t tell Warden, dear, but back when Greg was teaching me to drill, we happened to drill into bottom of main south reservoir—and had a tap with us, spilled hardly a drop. But we do buy some metered water, looks better—and ice pocket accounts for not buying much. As for power—well, power is even easier to steal. I’m a good electrician, Wyoh."