Source Control

What is source control?

Source control consists of measures taken to prevent pollutants from entering stormwater and thus affecting the water quality of surface water and groundwater. Source control measures are typically in the form of BMPs to keep the common pollutants generated in an urban environment from contacting stormwater, either through physical separation of areas or through careful management of activities that generate pollutants. Typical stormwater pollutants include chemicals (metals, nutrients, pesticides, etc.), trash, yard waste, and debris collected when flowing over impervious surfaces. Construction sites, pet waste, and excess fertilizer from lawns also can be potential sources of stormwater contamination.

What is the purpose of source control?

The main purpose of source control BMPs is to prevent pollutants from coming into contact with stormwater through physical separation and/or management of activities that produce pollutants.