Media filters

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For gravel filter ideas which use the filtering of geotextile, see infiltration trenches.


Surface filter Underground filter Perimeter filter Pocket filter Organic filter BioretentionA shallow excavated surface depression containing prepared filter media, mulch, and planted with selected vegetation.
Minimum head (m) 1.5 1.2 0.9 0.9 1.5 1.2
Ultra-urban Maybe Ideal Yes Maybe Maybe Maybe
Parking lots Ideal Yes Ideal Yes Yes Ideal
Roads Maybe Maybe Maybe Maybe No Yes
Residential Maybe Maybe Maybe Yes Maybe Yes
Landscaped No No No No Maybe Ideal
Rooftop Yes Yes Yes Yes Yes Yes

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