Pollutant removal percentages for filtration BMPs.
Link to this table
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1 For example, sand, mixed sand/peat and other geologic media
2 Grass filter/swale
3 See Appendix N discussion
4 Not enough information given in databases to differentiate type of filter so both combined for this entry
Pollutant Removal Percentages for Filtration BMPs (Source: ASCE International BMP Database (ww.bmpdatabase.org) and Winer (CWP), 2000 (see also Appenidx N) |
Practice |
TSS High-Med-Low3 |
TP High-Med-Low3 |
TN4 |
Metals4 (average of Zn and Cu) |
Bacteria4 |
Hydrocarbons4 |
Media Filter1 |
75-85-90 |
30-50-55 |
35 |
80 |
35 |
80 |
Vegetative Filter2 |
40-70-80 |
(-)51-0-35 |
35 |
80 |
35 |
80 |