By Jerd Smith, Rocky Mountain News - Published December 31, 2008 at 12:05 a.m.
Under Colorado water law, almost every drop of water that falls from the sky already belongs to someone who has a water right in state streams and in underground aquifers.
http://www.rockymountainnews.com/news/2008/dec/31/idea-let-folks-capture-rain/
(Apparently the spectre of large scale rain barrel operations threatens the future of Colorado water - Ed)
