Wet Season Percolation Testing

Last updated: December 27, 2018

2019 Wet Season Perc Testing Begins January 7,
Applications Are Being Accepted Now

Landscape View of Perc

The Anne Arundel County Department of Health will begin wet season percolation testing on Monday, January 7. Applications for mound sewage disposal systems must be received and testing must be performed by March 16, 2019. Priority will be given to areas where mound testing is expected. All other disposal system applications must be received and testing scheduled by March 29.

Sanitarian measure different layers of soil

The application and information on perc testing are available ​here or by calling the Bureau of Environmental Health at 410-222-7193. Send completed applications to the Anne Arundel County Permit Center, 2664 Riva Road, Annapolis, MD 21401. Testing is scheduled on a first-come, first-served basis.

Wet season testing is required for properties located in areas of the county with typically high water table conditions, and the highest water table is usually experienced during February, March and April. Monitoring wells in Anne Arundel County currently indicate groundwater levels are within the average wet season range. These wells are part of a monitoring well network used by the Maryland Department of Environment to assess groundwater levels. Each year, the Department of Health announces the start of the perc test period once the network wells have groundwater levels acceptable for wet season perc testing.

Testing provides an accurate assessment of a septic system’s ability to work in all seasons. The information provided by site evaluation and perc testing is used to determine the size and type of septic system that can be installed on a specific lot. In some cases, because of adverse soil or groundwater conditions, a property may only be developed when public sewer is available.

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