Median pollutant removal percentages for BMPs Revision as of 17:33, 5 May 2015 by Mtrojan (talk | contribs)(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff) Special:WhatLinksHere/Annual TMDL forms submitted by MS4 permittees > Guidance on how to use this website and the Manual > Median pollutant removal percentages for BMPs

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	85	link to table	link to table	link to table	50	35	95	80
Sand filter	85	50	91	0	35	50	80	80
Dry swale
Wet swale
Constructed ponds	84	50	91	0	30	70	60	80
Constructed wetlands

¹BMPs designed to infiltrate stormwater runoff, such as infiltration basin/trench, bioinfiltration, permeable pavement with no underdrain, tree trenches with no underdrain, and BMPs with raised underdrains.
²Pollutant removal is 100 percent for the volume infiltrated, 0 for water bypassing the BMP. For filtered water, see values for other BMPs in the table.