Print this fact sheet by P.E. Cabot, C.C. Olson, R.M. Waskom and K.G. Rein* (4/16) Quick Facts Most homeowners in Colorado are now allowed to use rain barrels to collect rainwater. A maximum of two rain barrels with a combined storage of 110 gallons or less are allowed at each household. Collected rainwater may be … Continue reading Rainwater Collection in Colorado – 6.707