The government can and does charge you for the water you get from them to water plants or your yard. They also estimate your swage bill based on the water you allow to flow through your water meter. Why pay a sewage charge for water you spray on plants? Why pay for city water to water plants when rain water will do the same thing?
It’s simple, collect your rain water in a way that conceals it from inquisitive eyes and don’t tell your neighbors or anyone on the net you are doing it. then water your plants as needed.
When you collect it and use it to water the yard or plants, you are in fact putting it right where it would naturally go, just not at the same time as it falls from the sky.
_________________________
You can run, but you'll only die tired.