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Garden Barrel

A small storage device that collects stormwater usually from a roof surface.

Also known as a Rain Barrel.


Green Infrastructure; MSD green infrastructure initiatives are referred to as rainscaping.


When referring to construction sites, it’s the changing of the existing ground surface to desired slopes, elevations, and forms. It’s used to direct and manage stormwater runoff, create accessible areas for buildings, automobiles, and people, and enhance landscape space definition and aesthetics.

Gray Water

Wastewater from showers, baths, washing machines, and sinks other than kitchen sinks.

Green Roof

Green roofs absorb and filter rainwater, provide building insulation, enhance roof lifespan, moderate roof deck temperatures, improve heating and cooling system efficiency, and add amenity value for urban rooftop views and spaces.

Also known as Eco Roof and Vegetated Roof.


Water that flows below the ground surface through saturated soil, glacial deposits, or rock.