One fifth of electrical output in California is consumed by pumping and processing water. By collecting rainwater, we can reduce our carbon footprint, conserve California’s water resources, and decrease our water bill. … In Bermuda, every residence is required by law to have and maintain a cistern capable of storing enough rainwater to sustain a family of four for a year. The states of New South Wales and Victoria in Australia require all new construction to be plumbed for rainwater catchment and grey water recycling. As of 2017, 26 percent of the homes in Australia capture rainwater.