| Stormwater BMP | Illustration | Pollutant Removal Mechanism | Location in Treatment Train | Pollutant Removal 1 | Potential Application |
|---|---|---|---|---|---|
| Dry swale or step pool | 
|
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 |
| 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 |
| Biofiltration Basin |  |
Sedimentation / Filtration | Beginning |
TSS: High TN: Low/Medium TP: Medium/High2 Chloride: Low Metals: High Oils and Grease: High |
Residential Commercial Retrofit |
| Permeable pavement with underdrain |  |
Filtration | Beginning |
TSS: High TN: Medium/High TP: Medium/High Chloride: Low Metals: High Oils and Grease: High |
Residential Commercial Ultra Urban Retrofit |
| Tree Trench/Tree Box (with underdrain) |  |
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 |
| Media filter (sand filter) |
|
Filtration | Throughout |
TSS: High TN: Medium TP: Medium/High Chloride: Low Metals: Medium/High Oils and Grease: High Pathogens: High |
Residential Commercial Industrial Recreation |
| Green roof |  |
Filtration | Throughout |
TSS: High TN: Low TP: Low Chloride: Low Metals: High Oils and Grease: High Pathogens: High |
Residential Commercial Ultra Urban Industrial Retrofit |
| 12 Low = < 30%; Medium = 30‐65%; High = 65‐100% 2Some media mixes can leach phosphorus. |
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