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A filtration system is provided which generally includes a filter assembly and a connector assembly coupled to the filter assembly and structured to position the filter assembly in a drain, for example a storm drain. The connector assembly may include adjustable connectors in order to accommodate va

A filtration system is provided which generally includes a filter assembly and a connector assembly coupled to the filter assembly and structured to position the filter assembly in a drain, for example a storm drain. The connector assembly may include adjustable connectors in order to accommodate various flow conditions. The system may further include a diversion element designed to effectively direct an inflow of water into the filter assembly and a removable contaminant removal pillow.

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What is claimed is: 1. A storm drain filter system comprising: a hopper element having a substantially open top and a water permeable bottom surface and including end pieces each having a portion structured to be positioned against a ledge of a storm drain inlet and lateral sidewalls disposed betwe

What is claimed is: 1. A storm drain filter system comprising: a hopper element having a substantially open top and a water permeable bottom surface and including end pieces each having a portion structured to be positioned against a ledge of a storm drain inlet and lateral sidewalls disposed between the end pieces; a filter assembly structured to be received within the hopper element, the filter assembly including a first frame element structured to engage the lateral sidewalls of the hopper element, and a container having porous sidewalls and a bottom spaced apart from the first frame element for separating and holding debris from water flowing through the storm drain; and a diversion element having an inlet sized and structured to direct a flow of water into the filter assembly. 2. The system of claim 1 wherein the lateral sidewalls define an overflow space sized to substantially inhibit flooding of the storm drain when the system is in use. 3. The system of claim 2 wherein the diversion element includes inner peripheral portion defining an opening, the inner peripheral portion being sized and structured to direct a flow of water into the filter element and substantially prevent bypass thereof. 4. The system of claim 1 wherein the filter assembly further comprises a contaminant removal element sized to substantially entirely cover the water permeable bottom surface of the hopper element. 5. The system of claim 4 wherein the contaminant removal element comprises a removable contaminant removal pillow. 6. The system of claim 5 wherein the contaminant removal pillow comprises a meltblown polypropylene material.