Stormwater filtration BMPs – selection considerations
Stormwater filtration BMPs – selection considerations
Link to this Stormwater filtration BMPs – selection considerations
| Stormwater BMP | Illustration | Cost | Maintenance Requirements 3 | Space needed | Pretreatment 4 | Habitat Quality 5 |
|---|---|---|---|---|---|---|
| Dry swale or wet pool | 
 |
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 pool |  |
Low | Simple | Small | Oil/Water Separator | Low |
| Biofiltration Basin |  |
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) |  |
Medium 3‐10 CF | Medium | Small to medium | No Pretreatment Required | None |
| Tree Trench/Tree Box (with underdrain) |  |
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) | Low | Simple-moderate | Small | Needed Oil/Water Separator, Vegetated Filter, Sediment Basin | Low | |
| Green roof |  |
High | Moderate-intensive | Small | Low | Medium |
1 Maintenance requirements to be addressed and updated in future section
2 Pretreatment requirements to be revised as per updated section
3 Habitat quality refers to the possible diversity of plantings commonly installed with each BMP