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Wet Season Percolation Testing

Department of Health Announces Delay in Wet Season Perc Testing

Now Accepting Applications in Preparation for Season’s Start

The Anne Arundel County Department of Health will delay the start of wet season percolation testing this year due to low groundwater levels; however, wet season perc applications are currently being accepted. 

To apply online​ ​click here.

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

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. Currently, monitoring wells in Anne Arundel County indicate groundwater levels are below the average wet season range. These wells are part of a monitoring well network used by the Maryland Department of the Environment to assess groundwater levels. The Department of Health will announce 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.