thanks all. Yes, I use a 100L tote for my water reservoir. Chloromine doesn't work well in communities that still have a lot of lead pipes. (what I read) My community has lots of old lead pipes, so I will just offgas the Chlorine.
I've wanted a rain barrel, but they've been so expensive. 100$ for a big plastic barrel? Maybe I'll find one this year.
We got our first barrel for free from our municipal water company. It actually helps the water company so it doesn't have to treat as much water. Rain water runs into the water supply and then gets treated. So lower costs for our water supply.
Preppers take water pretty serious and have some ingenious ways to collect rain water on the cheap.