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A cistern is a large tank that collects rainwater from your roof. Cisterns are most appropriate when you have significant outdoor water needs. They can be aboveground or buried underground.
Rainwater can be used for many activities, including:
Cisterns come in a variety of sizes. Select a cistern based on an estimate of how much runoff is generated by your home and how much water you can reuse on your property. Most cistern systems include a pump to provide sufficient water pressure to use the water. Locate the cistern in a shady or protected location to deter algae growth in the tank. Darker-colored tanks also help prevent algae growth.
It’s best to regularly use the water in your cistern to keep the system operating well and ensure there is capacity to store water from the next storm. It’s recommended to disconnect and drain the tank prior to the first winter freeze.