Permeable pavement allows water to be infiltrated into the ground. The interlocking pavers are placed on top of different layers of stone which are able to infiltrate stormwater when it travels down between the spaces in the pavers. Permeable pavers can carry a large upfront cost and while they do require long-term maintenance to keep clean, they do not take up any additional space in your yard and can be a great way to incorporate a BMP into an already planned driveway or patio upgrade. (Image from MWMO)