Excavator truck digging a trench

All properties are either served by public sewer or a private septic system as its means of wastewater disposal. Properties that are ineligible for public sewer service must complete satisfactory water table tests and percolation or sand mound testing to establish a sewage disposal area on the property before it can be considered buildable.

🆕 The 2024 Wet Season is now open for water table testing. Submissions will be accepted until Friday, April 5. The Wet Season will tentatively end on Monday, April 15. Please check for updates here.

2024 Wet Season Memo
Percolation Testing Requirements for Deep and Shallow Systems
Percolation Testing Expiration Policy 
Appeal Rights for Permit Denials
Montgomery County Soil Map Units
Guidelines for Percolation Testing


On-Site Evaluation and Testing

How it Works

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Fee Schedule