Hydrodynamic Separators

These systems are often supplementary to green stormwater infrastructure like bioretention practices. This “gray” infrastructure offers additional pretreatment benefits, specifically targeting heavy pollutant load areas. As they function underground, these separators may be chosen in areas with limited surface area. There are multiple systems that utilize various assets like oils skimmers, screens and flow controls in different ways to best serve the property they are installed on. In the case of a significant rain event, the systems allow the extra flow to bypass treatment without releasing previously collected solids.