Cost effective stormwater treatment combined with optimum purification. The ecoStorm™ is a technology intended for the separation of floating pollutants, litter and contaminated settling solids from stormwater drainage. ecoStorm™ consists of 2 circular concentric precast structures: An outer structure forms the swirl-chamber/vortex separator, the inner cylinder serves as a floatables collection chamber and outlet chamber. Swirl-chamber technology combined with vortex design principles, effectively treat the stormwater by removing and retaining sediments and floatables from site runoff.