Geotextile can be used to wrap geocellular tanks or to line aggregate layers and can significantly enhance the water treatment aspect of the water management system and is especially beneficial in infiltration or soakaway applications; particularly in proximity to sensitive aquifers or source protection zones.

Geotextile has been specifically designed for the hydrocarbon pollution treatment of surface water. It is capable of retaining oil contamination ranging from daily car drip losses up to catastrophic spillages, whilst allowing clean water to pass through the layer. The entrapped hydrocarbons are aerobically bio-degraded and the system is designed to be self-maintaining for the life of the installation.