The best material for a stormwater tank will depend on how the water is being used, the conditions of the site, and the project's overall budget. Reinforced polyethylene (RPE) liners are among the best materials for stormwater storage due to their strength, flexibility, and resistance to punctures and chemicals. These liners are commonly used to line earthen ponds, basins, or even large above-ground containment systems, creating a reliable barrier that prevents seepage and protects groundwater from contamination.
RPE is UV-resistant and can withstand a wide range of temperatures, making it suitable for both exposed and buried applications. Its lightweight nature allows for easier transport and installation compared to heavier materials like concrete. While concrete is often used for structural storage, RPE liners can be paired with it or used alone in lined basins to create a more cost-effective and adaptable system. Compared to plastic or steel tanks, RPE-lined systems can be scaled up more easily for larger stormwater volumes, especially in open or irregular spaces.
