Event mean concentrations by land use

NOTE: This page originally contained information from the National Stormwater Quality Database. We recently completed a literature review of event mean concentrations of total phosphorus and total suspended sediment in stormwater runoff. We recommend using information from this recent review rather than the data from the National Stormwater Quality Database.

• Event mean concentrations for total phosphorus - this is a table of event mean concentrations for total phosphorus, by land use
• Event mean concentrations of total and dissolved phosphorus in stormwater runoff - this page provides information and guidance related to event mean concentrations for total phosphorus

National Stormwater Quality Database-derived event mean concentrations for phosphorus and TSS

Event Mean Concentrations of pollutants in stormwater runoff by land use. Source: National Stormwater Quality Database.
Link to this table

Land use	Phosphorus EMC (mg/L)			TSS EMC (mg/L)
	Low	Medium	High	Low	Medium	High
Commercial	0.15	0.25	0.35	120	140	160
Industrial	0.15	0.25	0.25	130	150	170
Institutional	0.15	0.25	0.35	100	120	140
Multi-use	0.3	0.4	0.5	120	140	160
Municipal	0.2	0.3	0.4	120	140	160
Open space	0.1	0.2	0.3	70	90	110
Residential - high density	0.3	0.4	0.5	120	140	160
Residential - low density	0.4	0.5	0.6	130	150	170
Residential - medium density	0.2	0.3	0.4	100	120	140
Transportation	0.3	0.4	0.5	115	135	155