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DEP Home : Water : Stormwater Facility Maintenance Program


Stormwater Facility Maintenance Program


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For questions about stormwater facility maintenance, contact DEP:

311
Email: askdep@montgomerycountymd.gov




The Stormwater Facility Maintenance Program is responsible for inspecting and ensuring maintenance of all public and private stormwater management facilities within Montgomery County. The program is paid for by the Water Quality Protection Charge. It is vital that the structures be maintained in working order so they function as intended, providing protection and stormwater management for our parks, schools, and businesses.

Inspection and Maintenance

Stormwater facilities can become clogged by trash, debris, sediment and mud, or other stormwater pollutants. The facilities themselves can develop structural cracks and leaks over time. When this valuable infrastructure functions well, it:

The Stormwater Facility Maintenance Program has an Inspection section that inspects all stormwater facilities in the County every three years. The inspection is used to determine a facility's condition and to identify its need for maintenance. Without proper inspections and maintenance, we would not know when a facility has failed. Once a facility fails the cost of repairs are expensive and can result in property damage or other loss. Providing routine maintenance and inspections can keep the stormwater facilities working as intended, save money, property, and protect public safety.

Click the button to start the slideshow. To view descriptions of the photos, start the slideshow and enter fullscreen mode by clicking the button. Then click the "Show Info" link at the upper right corner of the screen.

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Stormwater Facility Maintenance Fact Sheets

Click on the links below to learn more about your stormwater facility and how to keep it functioning as designed


Aboveground Stormwater Facility Stormwater Pond Stormwater ponds can have both structural and non-structural maintenance.

Pond Non-Structural Maintenance
Fact Sheet applies to all property owners




Pond Structural Maintenance
Fact Sheet applies to nearly all commercial owners and to residential owners that have not transferred their structural maintenance to Montgomery County


Sand Filter or Infiltration Trench Sand Filters and Infiltration Trenches can have both structural and non-structural maintenance.

Sand Filter/Infiltration Trench Non-Structural Maintenance
Fact Sheet applies to all property owners








Coming Soon






Sand Filter/Infiltration Trench Structural Maintenance
Fact Sheet applies to nearly all commercial owners and to residential owners that have not transferred their structural maintenance to Montgomery County


Belowground Stormwater Facility The Belowground Stormwater Facility Maintenance Fact Sheets describe typical structural maintenance, such as power-washing, removing sediment and debris, and replacing filters.

Underground Filtering Facilities Maintenance
Including: Aqua-Filter, Bay-Filter, Storm-Filter, etc.





Coming Soon




Underground Sand Filter Maintenance

Coming Soon


Underground Storage Structures Maintenance




Coming Soon


Underground Hydrodynamic Separators Maintenance Including: Oil and Grit Separators, Baysaver, Aqua-Swirl, Stormceptor, etc.

Coming Soon


Flow Splitter Maintenance



On-Lot Practice (ESD/LID) Environmental Site Design (ESD)/Low Impact Development (LID) practices are smaller practices meant to capture the stormwater runoff from roofs, driveways, and parking lots on the same property. Overall maintenance is routine landscaping and removing tree debris and trash.

Rain Barrel Maintenance


Rain Garden Maintenance on Private Property

Grass Swale Maintenance

Buried Dry Well Maintenance

Porous Pavements Maintenance

Green Roof Maintenance

Coming Soon


Surface Dry Well Maintenance

Coming Soon


Non-Structural Practices Maintenance


Green Street or Right-of-Way Practice These fact sheets include useful information for property owners that live next to a bioswale, rain garden or porous pavement stormwater practice located within the County owned right-of-way. The right-of-way is located next to the road and may include a vegetated or grassed area and/or a sidewalk.

Coming Soon


Rain Garden in Right-of-Way Maintenance

Coming Soon


Porous Pavements in Right-of-Way Maintenance


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Where are the County's Stormwater Facilities?

The interactive map below shows all of the County's stormwater facilities. The colored dots represent different types of stormwater facilities. Clicking on a dot will reveal that particular facilities type. Read the next section, "How do stormwater facilities work?", to learn about what the different types of facilities do.


View Larger Map

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Who has responsibility for Maintenance of Stormwater Facilities?

Facility Maintenance Responsibility

Residential stormwater facility
Residential properties: DEP's Stormwater Facility Maintenance Program works with citizens to assume responsibility for structural maintenance for all new residential stormwater facilities and older residential facilities once the property owner has completed the maintenance transfer process. Once the facility has completed the transfer process, DEP will assume responsibility for the structural maintenance and the owner will continue to provide non-structural maintenance to their facility. The facility still is owned by the owner, DEP only assumes the structural maintenance responsibility.

Nonstructural maintenance: For all facilities, nonstructural maintenance is the responsibility of the owner. This maintenance includes grass cutting, trash removal, and landscaping.

Nonresidential (e.g., commercial) stormwater facility
Maintenance for most nonresidential facilities is the responsibility of the owner. This maintenance responsibility is defined for the owner in the "Designation of Authorized On-site Representative Form" and the signed form must be sent via e-mail to: mcstormwater@montgomerycountymd.gov.

Nonstructural maintenance: For all facilities, nonstructural maintenance is the responsibility of the owner. This maintenance includes grass cutting, trash removal, and landscaping.

Local government stormwater facility
Montgomery County assumes responsibility for both Structural and Non-Structural maintenance.

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Who can perform your Stormwater Facility Maintenance?

All stormwater facility maintenance contractors working in Montgomery County are required to have a Certificate of Attendance from the Department of Environmental Protection's Stormwater Facility Maintenance Contractor Training. Once contractors have been certified, they will be placed on a list of contractors approved by the County for maintenance of stormwater facilities. Please click here for more information on the Stormwater Facility Maintenance Contractor Training and the approved contractors list.

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Subscribe to the occasional email bulletin Stormwater BMP Maintenance Newsletter

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