Treatment best management practices

These best management practices address infiltration and filtration with or without an elevated underdrain.

Unlike end-of-pipe practices such as storm water ponds, bioretention areas are typically shallow depressions located in upland areas of a storm water treatment train. The strategic, uniform distribution of bioretention areas across a site results in smaller, more manageable catchment areas and will thus help in controlling runoff close to the source.

These structures represent the superior methods for water quality improvement (pollutant removal) and volume control, and should be applied whenever possible.

Bioretention Best Management Practices Description of practice »
	Rain garden illustrations
Photo: Ramsey-Washington Metro Conservation District
	Bioinfiltration basin and biofiltration basin illustrations
Photo: Ramsey-Washington Metro Conservation District
Permeable Pavement Best Management Practices
	These best management practices deal with the use of permeable concrete, permeable asphalt, permeable interlocking concrete pavers, crushed-rock, and/or turf-filled pavement systems with permeable base courses and/or amended subsoils. Description of practice » illustrations