What is a BMP?
BMP stands for Best Management Practice. Storm water management BMPs are control measures taken to mitigate changes to both quantity and quality of urban runoff caused through changes to land use. Generally BMPs focus on water quality problems caused by temporary land disturbances and increased impervious surfaces from land development. BMPs are designed to control and contain soil erosion, reduce storm water volume, peak flows, and/or nonpoint source pollution through evapotranspiration, infiltration, detention, and filtration or biological and chemical actions. Storm water BMPs can be classified as "structural" (i.e., devices installed or constructed on a site) or "non-structural" (procedures, such as modified landscaping practices, reducing the use of chemical fertilizers, etc.). There are a variety of BMPs available; selection typically depends on site characteristics and pollutant removal objectives. EPA has published a list of storm water BMPs for use by local governments, builders and property owners. Sections 50 and 60 of the Design Criteria for the Preparation of Improvement Plans include design standards and acceptable BMPs for use in meeting St. Charles County’s requirements for post-construction storm water runoff and construction site erosion and sediment controls.
Design Criteria for the Preparation of Imp. Plans

Show All Answers

1. Do I need a Land Disturbance Permit?
2. What are the requirements for construction adjacent to and within natural watercourses?
3. How can I protect my property from storm water drainage or alter storm water drainage within and adjacent to my property?
4. Other than storm water detention, what requirements do you have for storm water quality treatment?
5. What is a BMP?