Stormwater Management and Sediment and Erosion Control

Proper leaf and yard waste management

What to do with all the leaves in your yard?  If you have a mulching lawn mower, you can mulch all your leaves without having to remove them from your yard. The mulched leaves will help to fertilize your grass, and may allow you to fertilize your grass less than you normally would. If you prefer to remove the leaves from your yard, new regulations require that the leaves be bagged in either paper or plastic bags, to be picked up by the Department of Public Works. Do not blow or rake any leaves or yard waste down into the storm drains, as that is now prohibited by law. Leaves and yard waste can cause blocked storm drains, and once they enter the water column they add unnecessary nutrients to our waterways, contributing to the creation of any dead zones that are low on oxygen. Dead zones are detrimental to fish, crabs, and other aquatic wildlife. So keep it simple. Bag it. Mulch it. Compost it.

Download this free coloring book that will help educate your children about how storm drains work, and how the affect the environment. Dwayne the Stormdrain.

Stormwater Fee Credit Program

The City of Annapolis has raised the Stormwater Utility Fee effective July 1, 2011. The fee is assessed as part of the water and sewer bill. If you have installed any stormwater management structures or devices on your property, you may qualify to receive a 50% discount on your utility fee.

Residential properties - Application

Any on-site stormwater management facility qualifies for a 50% reduction in the utility fee. The stormwater management facility must be on your property to qualify for a fee reduction. Apartments, condominiums and subdivisions with off site stormwater facilities do not qualify for a fee reduction. Facilities must be inspected by city staff in order to be considered for a fee reduction. The fee reduction is good for two years from approval.

Commercial properties - Application

Any commercial property developed after 1985 should have on site stormwater management in accordance with Maryland regulations. Identify the type and location of the facility and verify that it is currently maintained and functioning to its design capacity. Provide a copy of the Stormwater Maintenance Agreement, or, if unavailable, the property owner and the city can create a new agreement. Facilities must be inspected by city staff in order to be considered for a 50% fee reduction. The fee reduction is good for two years from approval.

Commercial properties without existing stormwater management facilities can qualify for a fee reduction by installing stormwater management facilities that meet the current Maryland standards. Credit will only be given to commercial customers for stormwater Best Management Practices (BMPs) for which the city will receive credit toward its Total Maximum Daily Load (TMDL) goals. BMPs must have been installed no earlier than 1985 to receive credit: see list fee reduction application.

Grading Permits

Grading Permits are required for:

  • Any new single family home
  • Any non-waterfront lot disturbing 5000+ sf
  • Any waterfront lot disturbing 2000+ sf
  • Any lot with 100 cubic yards or more of cut or fill

Grading Permit Application

  • From application to issuance, grading permits take anywhere from 8 to 12 weeks or more. Please plan your project accordingly.
  • Please submit at least 7 copies of plans when applying for a grading permit.
  • Always get your grading permit number for easy reference throughout the project.

Grading permits require the project to be bonded. See application form and/or contact Matt Waters at 410-263-7946 for further information.

Grading permits require Anne Arundel County Soil Conservation District approval. Please see the AA Co. SCD Plan Submittal Guidelines.

Please note: All plans will be sent to the SCD by the City. Please do not send plans directly to SCD. Simply submit your plans and application to DNEP.

For further information or questions regarding the Grading Permit application process, please contact Debbie Morgan, 410-263-7946.

Stormwater Management

A building and grading permits with ground disturbance are reviewed for stormwater management. Please review the SWM Checklist.

  • Stormwater Management Water Quality Volume (WQv) and Recharge Volume (Rev) must be treated for:
  • Any new single family home
  • Any non-waterfront lot disturbing 5000+ sf
  • Any waterfront lot disturbing 2000+ sf

The goal of the City of Annapolis is to reduce impervious surfaces (asphalt, concrete, home footprints, etc) by 50%. If this cannot be done, WQv must be treated at a rate of 50% of the total WQv calculated (per MDE design manual and City Code).

WQv and Rev may be treated per the design manual methods. All treatment must be quantified. Treatment examples include:

  • Rooftop and non-rooftop disconnect credits
  • Greenroofs
  • Raingardens
  • Infiltration trenches
  • See MDE design manual for many further options
  • Please note tree plantings do not count for WQv treatment per the design manual.

Any Stormwater Management (SWM) facility must have a signed SWM maintenance agreement, ensuring it is properly inspected and maintained on a regular basis. Maintenance logs should be kept for each separate facility and shall be made available upon the City’s request. If you need help setting up a maintenance log, please contact Public Works at 410-263-7949.

If your project has a SWM facility, you will be required to sign the SWM maintenance agreement before the grading permit will be issued. Information on obtaining the SWM maintenance agreement will be given upon initial review of the grading permit application.

CPv, Qp and Qf are required on a case-by-case basis. Please have your engineer verify if the site conditions require these additional controls.

Erosion and Sediment Control

Mud in the streets equals MUD IN THE BAY!

All necessary efforts must be made to prevent erosion and sediment from escaping the job site and entering the waters of Maryland. This applies for all construction projects and even non-construction sediment and erosion.

Help prevent the transportation of sediment to the Bay. Sediment carries chemicals and nutrients, blocks sunlight and adds to the overall pollution of our waterways.

For more information you can call Frank Biba, Chief of Environmental Programs for the city at 410-260-2200 or see the Anne Arundel County pages on the affects of sedimentation and excess nutrients.


  • If you have a building permit, you must sign and Erosion and Sediment Control Plan form. This states you agree to use all necessary measures on your project to keep sediment from escaping.
  • If you have a grading permit, a sediment control plan shall be part of the plan set.
  • Installing reinforced silt fence will keep most soil contained if it is installed and maintained properly. Silt fence must be entrenched (bottom portion is underground) and remain upright without any holes. Soil should be kept from piling up against the silt fence.
  • Stabilizing any exposed ground with seed and straw, a layer of hardwood mulch or another stabilization method. The entire job site must be stabilized before construction above the ground level.
  • Only digging as much as needed for work that day will keep soil from un-necessarily being exposed to erosion if otherwise left open for extended periods of time.
  • Putting tarps over any piles of dirt to keep them from excess exposure to wind and rain to help prevent erosion.
  • Sweeping up any dirt or sand in the road, sidewalk or driveway and placing it in the disturbed area of your project or in your flower bed.
  • NOT hosing down your road, sidewalk or driveway to clean it up. This sends the sediment straight into the stormdrains (and on its way to the Bay)!
  • Call DNEP to report any instances of sediment and/or mud in sidewalks or roadways.
  • Fines can be levied when mud/dirt escapes a site.
  • Be pro-active in your sediment and erosion control.
  • Help educate others about the importance of keeping our soil in our yards and out of our water!
  • Do it for your wallet, but more importantly, DO IT FOR THE BAY!