When it is below 0, it is hard to imagine that in a few months all of our snow will be melting. As the snow melts it will be releasing and picking up pollutants such as dirt, debris, brake dust and oil just to name a few. This is one of the many reasons Percoa being pervious helps keep waterways clean. Using Percoa Slabs allows water to filter through to the ground thereby recharging the ground water. With the added benefit of having the slabs spread out so that large amounts of pollutants are not being directed into small areas. KARE 11 touched on this in a segment last spring.
In an article titled