Quick Answer
Using a cistern reduces the demand on municipal water supplies, decreases stormwater runoff, and minimizes the need for expensive and energy-intensive water treatment processes.
Conserving Municipal Water Supplies
A cistern reduces the strain on municipal water supplies by collecting and storing rainwater for non-potable uses such as flushing toilets, washing cars, and irrigating lawns. This approach can significantly decrease the demand on municipal water supplies, especially in areas with low rainfall or growing populations. According to the US Environmental Protection Agency (EPA), a single household using a cistern can save up to 3,600 gallons of water per year.
Reducing Stormwater Runoff
Cisterns also play a crucial role in reducing stormwater runoff by capturing and storing rainwater before it reaches local waterways. This helps to decrease the amount of pollutants and sediments that enter nearby water bodies, which can harm aquatic ecosystems and aquatic life. A properly sized cistern can collect and store up to 50,000 gallons of rainwater, reducing stormwater runoff and minimizing the risk of flooding.
Water Conservation and Efficient Use
Efficient cistern design and maintenance are essential for maximizing water conservation benefits. Cistern owners should ensure that their system is well-maintained, including regular cleaning and inspections to prevent contamination and ensure optimal storage capacity. By using a cistern, homeowners can also adopt water-efficient practices such as using low-flow appliances and greywater reuse systems, which can further reduce their water consumption and reliance on municipal water supplies.
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