Wet Season Percolation Testing

Last updated: April 10, 2019

2019 Wet Season Perc Testing Ends May 3

Landscape View of Perc

The Anne Arundel County Department of Health began wet season percolation testing on January 7 and wet season ends May 3. Testing on mound sewage disposal systems must have been performed by March 16, 2019. All other disposal system testing must have been scheduled by March 29. The Department of Health will make efforts to accommodate testing for applications received after March 30, but testing cannot be guaranteed.

Sanitarian measure different layers of soil

The application and information on perc testing were available ​here or by calling the Bureau of Environmental Health at 410-222-7193. Completed applications were sent to the Anne Arundel County Permit Center, 2664 Riva Road, Annapolis, MD 21401. Testing was 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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