Wet Season Percolation Testing

Last updated: February 12, 2020

2020 Wet Season Perc Testing Starts February 18

Landscape View of Perc

The Anne Arundel County Department of Health will start wet season percolation testing on February 18, 2020, and wet season perc applications are currently being accepted. Testing will be conducted on a first-come, first-served basis. Mound sewage disposal system applications must be received by February 28 and testing performed by March 6. All other applications must be received and scheduled by March 31.

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.

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 indicate groundwater levels are in 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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