Typical BMP TSS and TP removal rates from Minnesota Stormwater Manual
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BMP type Typical pollutant removal rate (%)
TSS TP
Biofiltration 80 [1]
Sand filter 85 50
Iron enhanced sand filter 85 77
Dry swale 68 [2]
Constructed wet ponds 84 50
Constructed wetlands 73 38
Permeable pavement 74 45
Green roof 85 0