Median pollutant removal of total suspended solids by stormwater treatment practices. Values represent percentage of incoming pollutant load that is removed. Source: Minnesota Stormwater Manual. Manual data was based on information from ASCE/EPA International Database; Winer (2000)
| BMP group | Total suspended solids |
|---|---|
| Bioretentiona | 85c |
| Filtrationb | 85 |
| Infiltrationd | 100 |
| Stormwater ponds | 80 |
| Stormwater wetlands | 75 |
aData based on fewer than five monitoring studies
bExcludes vertical sand filters and filter strips
cFiltration values used
dNote that 100% is assumed for all infiltration, but only for that portion of the flow fully treated in the infiltration facility; by-passed runoff does not receive any treatment.