Building codes often apply to stormwater harvesting systems, as they are considered part of a property’s water management infrastructure. These codes ensure that the installation, design, and operation of stormwater systems meet safety, environmental, and health standards. Requirements can vary by jurisdiction but typically cover aspects such as the sizing of storage tanks, filtration, and disinfection systems, as well as the materials used for pipes and tanks.
In many areas, systems must include safeguards like backflow preventers to protect the potable water supply from contamination. Local building codes may also specify how the harvested water should be treated depending on its intended use, especially for irrigation, cooling, or industrial purposes. Some regions have specific codes that support the integration of green infrastructure, such as permeable surfaces or rain gardens, alongside stormwater harvesting.
