I was just wondering how useful rain water is. I have a rain barrel which has had rainwater that has been sitting for well over six months. To me this seems like a perfect source of soft aged water. However I live in Scarborough so I don't know what the quality of the water would be like. As an aside note my gutters are full of debris and now have plants growing out of them so would that help purify the water like a tiny linear swamp.

