Minimum Vertical Separation From Water Table

01/05/26

“Why do some engineering systems require a minimum vertical separation from the water table?”

Engineering systems may store water beneath the surface, such as septic systems for wastewater or infiltration systems for stormwater. However, these systems can cause catastrophic damage if they’re built too close to the water table. Septic systems can leach wastewater and contaminate groundwater supplies, while water infiltration can raise the water table and lead to flooding. Consequentially, government regulations may require a Minimum Vertical Separation From Water Table to ensure public safety. For example, the NYC Department of Environmental Protection mandates that stormwater infiltration practices in Brooklyn and Queens are at least 4 feet above the groundwater table.

Image credit: https://michigansaves.org/

• Earth/Climate science
• Engineering
• Policy
• Urban Systems