Stormwater Management Data for Sediment Control Permits

The Maryland Department of the Environment (MDE) requires Montgomery County to document information for each stormwater best management practice (BMP) for the County’s Municipal Separate Storm Sewer System (MS4) Permit.

As such, Effective July 1, 2024, Montgomery County will collect stormwater management (SWM) data for each new sediment control permit that requires stormwater management in order to meet MDE requirements and for SWM BMP tracking purposes.

Stormwater Management Data Submission Instructions

1. Is stormwater management data required?

   No, if stormwater management is not required for the project, no further action is required.

   Yes, if stormwater management is required even if it is waived or otherwise cannot be provided for the project, proceed to Step 2.

2. Download the stormwater management data file

   SWM Sites (XLSX)

3. Rename the stormwater management data file

   You must include the sediment control permit number and the project name.
   Example: 'SC-123456-project-name.xlsx'

4. Enter stormwater management data

   Complete all fields and records except those that are not applicable to the project. The following fields are not applicable if:

   • No SWM is waived: Quality/Quantity Waived and Waiver Amount
   • No quantity management is provided: Quantity Types Managed
   • No 10-year discharge was calculated: 10 Year Storm Discharge sheet/tab

5. Submit stormwater management data file

   If your project has an Engineered Sediment Control Plan:
   Email data file to [email protected] when submitting as-built plans to DPS for review.

   If your project has an Engineered Single Family Lot Plan:
   Email data file to [email protected] when submitting Engineered Single Family Lot Plan to DPS for review.