This table shows a list of BMPs and associated pollutant removal mechanisms. Primary (removal) means the BMP was designed for this specific mechanism. Secondary (removal) means the BMP provides additional removal of pollutants for this mechanism even though the BMP was not designed for that purpose. An empty cell means the BMP provides limited or no removal for that mechanism.
| BMP group | Pollutant removal mechanisms | |||||
|---|---|---|---|---|---|---|
| Water quality | ||||||
| Filtration | Infiltration | Settling | Biological uptake | Temperature control | Soil adsorption | |
| Pollution prevention | Not applicable - pollutants not exposed to stormwater | |||||
| Better Site Design/low impact development | primary | secondary | secondary | secondary | secondary | secondary |
| Runoff volume minimization | secondary | secondary | ||||
| Temporary construction sediment control | primary | |||||
| Bioretention | primary | secondary | secondary | secondary | secondary | secondary |
| Filtration | primary | secondary | secondary | secondary | ||
| Infiltration | secondary | primary | secondary | primary | secondary | |
| Stormwater ponds | secondary | primary | secondary | |||
| Stormwater wetlands | secondary | secondary | primary | primary | secondary | |
| Supplemental treatment | Each supplemental and proprietary device should be carefully studied to learn the primary and secondary removal functions | |||||