The availability of fresh water is becoming a major concern for everyone on the Island of Mauritius. The severe drought, which is prevailing on the Island of Mauritius , has affected our agriculture and may lead to severe environmental problems. This research is based on a model for reuse and recycling of grey water, sullage. It is estimated that an average person utilises 200 litres of water per day. At least 65% of this volume is converted into grey water, which is released directly to the environment. Sullage can be purified using a biological process, which can takes place into the root zone areas of reeds, an acquatic plant locally known as voon.