Stormwater filtration BMPs summary table
Link to this table

Stormwater BMP Illustration Pollutant Removal Mechanism Location in Treatment Train Pollutant Removal 1 Potential Application Cost Maintenance Requirements 3 Space needed Pretreatment 4 Habitat Quality 5
Dry swale or step pool image dry swale


step pool schematic
Sedimentation / Infiltration Throughout
TSS: Medium
TN: Low
TP: Medium
Chloride: Low
Metals: Medium
Oils and Grease: Low
Pathogens: Low
Residential
Commercial
Industrial
Highway/Road
Recreational
Low to medium (depends on components) Simple‐Intensive Small Oil/Water Separator Sediment Basin (depending on watershed soil types, contributing drainage area, and potential for system fouling/plugging) Low
Wet swale Screen shot of the Watershed tab for Wet swale Sedimentation / Transpiration Throughout
TSS: Medium
TN: Low
TP: Low
Chloride: Low
Metals: Low
Oils and Grease: Low
Pathogens: Low
Residential
Commercial
Industrial
Highway/Road
Recreation
Low Simple Small Oil/Water Separator Low
Biofiltration Basin
Biofiltration 1 for credit page.jpg
Sedimentation / Filtration Beginning
TSS: High
TN: Low/Medium
TP: Medium/High2
Chloride: Low
Metals: High
Oils and Grease: High
Residential
Commercial
Retrofit
Low $0.5‐$1.3 CF Simple‐Intensive Small to medium Needed Oil/Water Separator, Vegetated Filter, Sediment Basin, Water Quality Inlets Medium‐High
Permeable pavement with underdrain
Permeable pavement icon.png
Filtration Beginning
TSS: High
TN: Medium/High
TP: Medium/High
Chloride: Low
Metals: High
Oils and Grease: High
Residential
Commercial
Ultra Urban
Retrofit
Medium 3‐10 CF Medium Small to medium No Pretreatment Required None
Tree Trench/Tree Box (with underdrain)
Symbol for tree trench with underdrain.jpg
Filtration, Transpiration Throughout
TSS: High
TN: Medium/High
TP: Medium/High
Chloride: Low
Metals: High
Oils and Grease: High
Pathogens: High
Commercial
Ultra Urban
Retrofit
High

$1.80 ‐ $12.70 CF based on recommended soil volume

of 1,414 CF per tree
Intensive Small to large Needed Oil/Water Separator, Water Quality Inlets Medium
Media filter (sand filter)
schematic showing sand filter system
Filtration Throughout
TSS: High
TN: Medium
TP: Medium/High
Chloride: Low
Metals: Medium/High
Oils and Grease: High
Pathogens: High
Residential
Commercial
Industrial
Recreation
Low Simple-moderate Small Needed Oil/Water Separator, Vegetated Filter, Sediment Basin Low
Green roof green roof schematic Filtration Throughout
TSS: High
TN: Low
TP: Low
Chloride: Low
Metals: High
Oils and Grease: High
Pathogens: High
Residential
Commercial
Ultra Urban
Industrial
Retrofit
High Moderate-intensive Small Low Medium

12 Low = < 30%; Medium = 30‐65%; High = 65‐100%
2Some media mixes can leach phosphorus.

This page was last modified on 19 March 2018, at 14:09.

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