BMP pollutant removal for bacteria | Minnesota Stormwater Manual

BMP pollutant removal for bacteria

Median pollutant removal of bacteria by stormwater treatment practices. Values represent percentage of incoming pollutant load that is removed.
BMP group	Bacteria^a>
Bioretention^b	35
Filtration^c	35
Infiltration^d	100
Stormwater ponds	70
Stormwater wetlands	75
Source: Minnesota Stormwater Manual. Manual data was based on information from ASCE/EPA International Database; Winer (2000) ^aBacteria data include fecal streptococci, fecal coliform, E. coli, and total coliform ^bData based on fewer than five monitoring studies ^cExcludes vertical sand filters and filter strips ^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.