Stormwater Hotspots

Definition: A land use or activity that produces higher concentrations of trace metals, hydrocarbons or priority pollutants than normally found in urban runoff.

• Auto recycling

• Commercial parking lots

• Fleet storage areas

• Industrial rooftops

• Landscaping/nursery

• Industrial (outdoor storage or unloading)

• Public work areas

• Vehicle service & maintenance

• Vehicle washing/steam cleaning

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Stormwater hotspots are areas which produce higher concentrations of pollutants than normally found in urban runoff. Certain areas of the urban landscape are known to be hotspots of stormwater pollution. Examples include gas stations, parking lots, and auto recycling facilities. Generally, stormwater hotspots contribute 5 to 10 times higher concentrations of trace metals and hydrocarbons in stormwater runoff. These hotspots merit special management and pollution prevention activities.