Actually, your water dos depend on electricity. Most water treatment plants use a fair number of pumps to move water through the process. If the plant loses electricity it loses its ability to properly treat water. It may even lose the ability to maintain water pressure in the mains. Many variables here but be careful of counting on city water during an extended power outage.
I knew that. But, the water company and plant are on a different electric server than I am. That's why I said I didn't need electricity to run my water. I was just talking about my house.
I lose power a minimum of five times a year due to downed trees (Girl Scout camp is in the woods across the street from me). In the last thirteen years, I've lost power for more than six hours three times. Once in the winter of 2002 (several trees went down during an ice storm), once in june about six years ago (a few substations went down at once), and when Ike went through here (a couple of substations went down and trees pulled lines down).
The longest I've gone without power was in 2002. We didn't have power for 4 days. The city three miles from me didn't lose power. But, everyone on my road did.