Interesting, Coloradans have no claim to water falling from the sky even when it lands on their property… and water can only be used once. Read the link, the bit about rain barrels being the bong of the garden is priceless.
Rain barrels there, you see, are outlawed. Colorado state law mandates that any water falling from the air is not yours. In fact, according to their site, its already been “legally allocated” — so, you don’t actually have any rights when it comes to using precipitation that falls on your property.
[From In Colorado, Rain Barrels Are Illegal. Yup. » GroovyGreen.com - Start Today :: Save Tomorrow]