Vaults, boxes, systems, and methods of treatment systems to capture pollutants from storm water runoff and prevent the conveyance of these pollutants from entering a receiving water body or landscape area, which is designed to be a part of a local permanent storm water drainage infrastructure. A single treatment box, vault and system combines both drainage conveyance, multi-level treatment techniques, variable hydraulic capabilities, and easy and inexpensive methods for servicing the system, along with a hinged skimmer system with or without a float. The hinged skimmer system can include a rigid vertical panel attached by pivotal support rods that allow the vertical panel to move up and down along a vertical plane in front of an outlet flow line to a vault. The system can also include components selected from a shelf or baffle beneath the hinged skimmer, a dual screened filtration system, media filtration, and hydroslide water pressure lines with spray heads for cleaning debris on a sloped floor, as well as a flow spreader, debris ramp and screened deflector.

A stormwater collection, treatment, and aquifer replenishment installation includes a stormwater drain for receiving surface stormwater, a dry well downwardly extending underground to an outlet proximate to a water table over an aquifer, a tank structure at least partially disposed underground and coupled with the stormwater drain and the dry well in stormwater communication, a stormwater treatment system enclosed within the tank structure between the stormwater drain and the dry well for converting surface stormwater into treated stormwater, the tank structure for conducting surface stormwater to the stormwater treatment system between the stormwater drain and the dry well, and the dry well for receiving and gravity feeding treated stormwater from stormwater treatment system to the outlet.

A method of removing sediment from fluid flow within a storm water drain pit by deflecting flow entering the pit towards the side walls of the pit by one or more deflectors. This reduces the energy of the fluid flow and promotes settling of sediment within the catch pit. Each deflector is preferably of a concave form and may be located in a storm water drain pit bag or suspended. A removable catch basin receptacle for a storm water drain pit includes a container has a low flow outlet defining a fluid path for fluid at a first level within the container to a second level, higher than the first level, outside the container. An overflow path provides a fluid flow path out of the container at a level higher than the first or second level.

A water detention system for detaining storm water having a side wall and a bottom floor; an inlet conduit for ingress of storm water; and a water discharging assembly, which includes a siphon, configured to pass storm water there through; and an outlet conduit for egress of storm water from the water discharging assembly. The inlet and outlet conduits are disposed through the side wall of the water detention system. A water discharging assembly for discharging storm water from a water detention system includes an outer enclosure; a first opening in the outer enclosure for ingress of water; a second opening in the outer enclosure for egress of water; and a siphon disposed within the outer enclosure; where, except of the first opening and the second opening, the outer enclosure is substantially fluid tight.

Systems, devices, and methods for providing nutrient removals in an up flow filtration storm water system for treating water to very high clean levels using filtration media. A filtration media can be supported by a screen above a floor in a vault allows for incoming storm water to pass into a void space above the floor into the screen and filtration media and then out an outlet to the vault. The filtration media can include recyclable and/or natural particles. Layers of river rocks can be placed on top of and below the filtration media. The captured debris can drop to the floor. The long lasting filtration media can be cleaned by being backwashed.

A catch basin trap for mounting in an opening in a side wall of a catch basin. A preferred catch basin trap has a body with a front side for facing outwardly to outside of the catch basin, and a back side for facing inwardly to inside of the catch basin. An inlet opening is provided in the back side of the body for receiving drainage water from inside of the catch basin. An outlet opening is provided in the front side of the body for discharging the drainage water to the outside of the catch basin. A flexible outlet pipe connector extends outwardly from the outlet opening, configured for watertight coupling to an outlet pipe positioned outside of the catch basin. The catch basin trap provides a water flow path for drainage water from inside of the catch basin to the outlet pipe. A preferred outlet pipe connector is adapted to facilitate installation of the catch basin trap by allowing watertight coupling to the outlet pipe at a plurality of angles and positions relative to the catch basin trap, and to accommodate angular and transpositional deviations of the outlet pipe resulting from settling of the ground after installation.

A hydrodynamic separator for storm water includes weirs and a first plate within a housing to create a pretreatment area for the storm water. The separator further includes a hollow inner member for inducing rotational flow of water and having an outlet below the first plate which outlet is connected to a lower second plate. Solids further settle from the water in the housing below the lower second plate. A water exit path exists between the two plates.

A stormwater management inlet prefilter for system use in green infrastructure which typically includes either biofiltration (e.g. bioretention, tree planters, gravel wetlands) or infiltration (e.g. leech fields, dry wells, infiltration trenches and basins) that both provide recharge of stormwater runoff to groundwater aquifers and treated discharge to surface waters. The system can be used as an edge of curb system, a drop inlet, or inline. The system can be used both in retrofit or new installations and extends the operating life and reduces the maintenance burden of stormwater management systems by filtering out trash and debris at the inlet. The system enables the simplified maintenance of stormwater management systems at the inlet in an accessible location with no special equipment required. Installation is simple and comparable to common catch basins and grates. Preferably, the system is made of pre-cast concrete, HDPE, and stainless steel and is resistant to rust and rot from corrosive winter runoff. No special equipment necessary and maintenance is simple and utilizes standard vacuum trucks for catch basin cleaning by use of a pressure washer and vacuum equipment.

A stormwater drain baffle to be disposed in a flow-through stormwater sump or chamber for baffling a stormwater flow-path. The baffle has a plurality of openings distributed over the area of the baffle. The baffle comprises at least two baffle portions connected to each other. The baffle portions are disposed near to and in superposed relation to each other, so that the baffle portions overlap each other and are adjustably connected to each other for adjusting the width (W.sub.tot) of the baffle. At least the outermost baffle portions of the baffle comprise fixing members which are monolithic with the baffle portion and adapted for fixing the baffle to the vertical inner wall of the sump or the chamber.

A stormwater management inlet prefilter for system use in green infrastructure which typically includes either biofiltration (e.g. bioretention, tree planters, gravel wetlands) or infiltration (e.g. leech fields, dry wells, infiltration trenches and basins) that both provide recharge of stormwater runoff to groundwater aquifers and treated discharge to surface waters. The system can be used as an edge of curb system, a drop inlet, or inline. The system can be used both in retrofit or new installations and extends the operating life and reduces the maintenance burden of stormwater management systems by filtering out trash and debris at the inlet. The system enables the simplified maintenance of stormwater management systems at the inlet in an accessible location with no special equipment required. Installation is simple and comparable to common catch basins and grates. Preferably, the system is made of pre-cast concrete, HDPE, and stainless steel and is resistant to rust and rot from corrosive winter runoff. No special equipment necessary and maintenance is simple and utilizes standard vacuum trucks for catch basin cleaning by use of a pressure washer and vacuum equipment.