Permeable pavement is a type of pavement that allows rainwater to pass through the pavement and soak into the soil below. Unlike conventional pavement, which is entirely impervious and causes precipitation to “run off”, permeable pavement has small pore spaces or voids which enable water to be transmitted to the soil and groundwater beneath. Permeable pavement may be composed of any number of materials such as porous asphalt, pervious concrete, interlocking pavers, or grass pavers. All permeable pavements have a surface pavement layer, a layer of crushed stone underneath, and a filter or fabric layer at the bottom. The benefits of permeable pavement include:
- Replenishment of groundwater resources
- Protect against flooding
- Help prevent stream erosion
- Improve water quality
- Last longer than conventional pavement if property maintained
- Enhance aesthetics of a community (in the case of grass pavers)
For further information on permeable pavement, please refer to the factsheet available here. For guidelines on how to install permeable pavement on your property, click here.