Using porous pavement for a home's driveways, walkways, and patios has numerous benefits for the environment. For one, it helps recharge groundwater by allowing rain and snowmelt from paved surfaces to percolate into the soil. Porous pavement also reduces stormwater runoff and the contaminants that runoff carries. Further, the water that is absorbed into the soil is of a higher quality because porous pavement systems filter some pollutants out of the water before it's absorbed.