Event mean concentrations for total phosphorus
Information: This page was updated October 31, 2019. Read table caption below.
Event mean concentrations for total phosphorus. This table was updated October 31, 2019. We retained data from the previous table, but we recommend using the median values from a literature review (3rd column). To see supporting information used to derive this table, link here.
Link to this table
| Land cover/land use | Range (mg/L) | Recommended value (mg/L)1 | Notes |
|---|---|---|---|
| Commercial | 0.20 - 0.34 | 0.200 | If applicable to models being used, adjust curve numbers/runoff coefficients when calculating loads |
| Industrial | 0.23 - 0.55 | 0.235 |
|
| Residential | 0.26 - 0.38 | 0.325 | Concentrations vary widely depending on local conditions |
| High-density/Multi-family residential | 0.28 - 0.40 | Calculate |
|
| Medium density residential | 0.18 - 0.40 | Calculate | *Insufficient information to recommend a specific emc
|
| Low density residential | 0.24 - 0.40 | Calculate |
|
| Freeways/transportation | 0.25 - 0.45 | 0.28 |
|
| Mixed | 0.25 - 0.45 | 0.29 | Residential land use was the primary land use in most studies that cited values for mixed land use |
| Parks and recreation | Calculate |
|
|
| Open space | 0.12 - 0.31 | 0.19 | |
| Conventional roof | 0.05 - 0.20 | ||
| Public/semi public (institutional) | 0.18 - 0.40 | ||
| Cropland | |||
| Forest/shrub/grassland | 0.03 - 0.25 | 0.07 | Concentrations are likely to vary with season in areas with fall leaf drop |
| Open water | |||
| Wetlands | |||
| Farmsteads | |||
| Forest | 0.05 - 0.25 | 0.25 |