Porous pavement systems are designed to allow stormwater to infiltrate directly through the pavement surface and into the underlying stone reservoir, where it can either infiltrate into the surrounding soils or be slowly released through an underdrain system. This process reduces stormwater runoff, improves water quality, and helps manage peak flows on developed sites.

Over time, sediment, fine particles, organic material, and debris accumulate on the pavement surface. These materials can become lodged within the small pore spaces that allow water to pass through the pavement. As these pores become clogged, the infiltration rate of the system decreases and the pavement may begin to function more like traditional impervious pavement, reducing its stormwater management benefits.

Without routine maintenance, clogged porous pavement systems can lose their infiltration performance, leading to surface ponding, reduced system efficiency, and potential regulatory compliance issues. Regular maintenance helps restore infiltration capacity, remove trapped sediment, and extend the service life of the pavement system.