Gov. John Hickenlooper this week signed into law a bill allowing homeowners and businesses to reuse bathroom sink, shower and other graywater.

Rep. Randy Fischer, D-Fort Collins, and Sen. Gail Schwartz, D-Snowmass Village, introduced House Bill 1044. Hickenlooper signed the bill at Colorado State University on Wednesday.

The bill directs the Colorado Water Control Commission to create statewide standards for gray water systems. It defines graywater as water coming from bathroom and laundry room sinks, bathtubs, showers and laundry machines.

"Graywater does not include the wastewater from toilets, urinals, kitchen sinks, dishwashers or non-laundry utility sinks," the bill states.

The law comes as the state of Colorado forecasts a shortage of more than 3 million acre-feet of Colorado River water by 2060. An acre foot equals 326,000 gallons, enough to supply 2.5 households for one year.

The new law lets cities, towns and counties decide whether to approve graywater use in residential and commercial settings.

"This new law helps to address the problem of how we are going to provide water for Colorado's growing population," Fischer said in a statement.

The bill had support from the Northern Colorado Water Conservancy District, the state's largest water wholesaler, because it promotes water efficiency.