Percolation Tests

Percolation (PERC) testing is required for any property that is not going to be served by public sewer and before any on-site sewage disposal system can be installed. If you plan to build on undeveloped property in Prince George's County and your property is unable to be served by public sewer, you must apply to the Prince George's County Health Department to conduct PERC testing.

Guidance on Percolation Testing and Soil Evaluation

Latest Wet Season Update 12/29/2025

The start of the Wet Season is determined by the conditions of perched observation wells located throughout the county. Well, readings reveal that the conditions required to start the Wet Season have not been met.  Readings reveal lower-than-normal groundwater levels and the lack of saturation within the soil profile. Bi-weekly observation well readings will continue until a determination has been made. 

Applications

There are a few steps to have percolation tests conducted for a property. First, you must apply online through the Momentum website.  The fee schedule for the Health department provides the pricing for any applications. The percolation test fee includes a 10% technology fee as well as an administrative fee. It takes approximately two weeks to process applications. 

You can select a registered Prince George's County Percolation Test Contractor from our approved vendors to conduct the test. Your test date is requested through your application in Momentum. The Area Environmental Health Specialist will confirm the date, meet onsite with the Prince George's County approved contractor of your choice, and record the results of the test. Contact the Environmental Engineering/Policy Program at EnvironEngProgram@co.pg.md.us for additional information. 

Licensed Percolation Contractors

Use this list to find an approved and currently licensed percolation contractor for your property's soil evaluation needs.