Porous asphalt is a popular paving choice for many reasons. It's cost efficient, eco friendly and considered an EPA best practice. Porous asphalt pavement has tiny holes that allow water to percolate through it into the soil below. This helps with storm water runoff after a heavy rain. The key to keeping porous asphalt looking new is maintenance. Proper maintenance done on a regular basis will keep the porous asphalt pavement looking and functioning like new for many years.