An apparatus and method for use in conjunction with grassy swales and sidewalk
cross drains to collect and filter or otherwise treat dirty or polluted storm water
runoff or other fluid is disclosed. One or more prefilters are installed at one
or more inlets to a grassy swale or a sidewalk cross drain, such that at least
a portion of any storm water runoff or other passing fluids are at least partially
filtered or otherwise treated to some extent before entering the grassy swale.
The prefilters comprise an inlet adapted to deliver fluid therethrough; an outlet
adapted to deliver fluid therethrough, one or more structural elements connecting
to inlet to the outlet, and one or more filtration elements attached to at least
one of the structural elements.
