Quick Answer
Key regulations for cistern installation vary by location, but typically include permits, inspections, and adherence to local water codes. Homeowners must check with their local government to determine specific requirements. A well-designed cistern system will also meet national standards for water quality and safety.
Determining Cistern Size
Cistern size is determined by the water collection area, roof size, and rainfall. The International Association of Plumbing and Mechanical Officials (IAPMO) recommends a minimum of 1,000 gallons for a single-family home. However, a larger cistern is often necessary to account for evaporation and water usage. For example, a 1,500 square foot roof can collect approximately 1,500 gallons of water in a moderate rainfall event. A 1,000-gallon cistern would not be sufficient.
Local Building Codes and Permits
Local building codes and permits are essential for cistern installation. Homeowners must check with their local government to determine specific requirements, but most cities require a permit for cistern installation. Typically, this includes submitting plans for cistern design, materials, and installation. The permit process may also involve inspections to ensure compliance with local building codes and water quality standards.
Water Quality and Maintenance
Cistern water quality is critical for safe consumption and use. Regular maintenance is essential to prevent bacterial growth and contamination. Homeowners should test the water quality at least once a year, and more often if the cistern is used for drinking water. Maintenance tasks include cleaning the cistern, checking for leaks, and inspecting the roof for damage or debris.
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