Fixed the dishwasher myself! I found
http://hometips.com/cs-protected/guides/dishwafix.html
and disassembled the float. That didn't help. Then I realized
that in addition to a hardwired pipe --which may be natural
gas-- going in, there is also a hose with a valve. I turned it on,
and now the dishwasher works --it uses clean water. Kinda
gross thinking about when the water was shut off. That
must have been when I fixed the food disposer.

Have to fix a flap valve in a toilet and replace a safe outlet which doesn't stay on.