Tree box filter

A tree box filter is a best management practice (BMP) or stormwater treatment system widely implemented along sidewalks, street curbs, and car parks.

Such factors include: In order to accommodate such considerations, the location, design, and type of material of the box filter may be altered.

[3][4] As a result, strategically positioning multiple tree boxes around the area of coverage is vital, when trying to reduce costs and work.

The drainage pipe connects to the municipality's existing storm drain system, allowing excess water to flow out, preventing overflow.

Optionally, a metal grate may be placed on top of the concrete box, blocking large pieces of debris from entering the soil layer.

[2][3][9] When implemented properly, tree box filters can significantly reduce the amount of pollutant in the stormwater that it infiltrates.

[7] Tree box filters remove about 80-90% of total suspended solids, 38-65% of nitrogen, and 50-80% of phosphorus, 54% of zinc, 40% of copper, and 90% of petroleum hydrocarbons.