Median pollutant removal percentages for several stormwater BMPs. More detailed information and renages of values can be found in other locations in this manual, as indicated in the table.
Link to this table

Practice TSS TP PP DP TN Metals Bacteria Hydrocarbons
Infiltration 1 2 2 2 2 2 2 2 2
Biofiltration

1
2 Grass filter/swale