I have a friend who runs a rainwater harvesting company and have contacted her to install a rainwater collection system to water my garden. Hopefully this can happen this summer! I REALLY think rainwater harvesting is a great opportunity, it is too bad there are so many bylaws about it in the city :(
I attended a workshop by Brad Lancaster a couple of years ago here in Calgary. I really like his books and what he is working on. Here is a link to his webpage!
https://www.harvestingrainwater.com/store/
There is so much great information and creative ideas out there about rainwater harvesting. I really like the idea of creating mulch basins using curb cuts to divert water from the street to water public right of ways like boulevards. This idea was started in Portland Oregon and I learned about this over 5 years ago and think it is brilliant but don't have a boulevard (poor excuse though!).