Permeable pavers, also known as permeable interlocking concrete pavements (PICP), are installed with layers of varying-sized stone or aggregate underneath that filter and direct stormwater to underground aquifers. Permeable pavers mimic the way natural land absorbs water. With permeable concrete pavers, any rain that falls on your patio, walkway or driveway seeps back into the ground, reducing the burden on storm drains. A permeable paver system can even be designed to harvest and recycle rainwater.