What are you talking about? You can’t have a rain barrel? You got a link or something? Never heard of that!
https://www.naturalnews.com/029286_rainwater_collection_water.html
In some states like Colorado, people go to jail for collecting rain from their roof. It doesn’t belong to you, says the government!
a run-in with a Washington County deputy and the Commonwealth Attorney for the County
who both made it quite clear that doing so was a felony offense.