The Environmental Passive Integrated Chamber (EPIC) system from Firestone Building Products is designed to collect, filter, retain, and distribute water below ground. Combining passive subsurface irrigation, water storage, and filtration, EPIC uses capillary rise and gravity and is suited to handle stormwater from roads, roofs, and other hardscapes. The system recycles graywater on site for subsurface irrigation, minimizing the amount of pollutants entering groundwater and eliminating the need for open retention ponds. It irrigates with 50% to 85% less potable water than traditional overhead irrigation systems.