Existing wastewater treatment technologies such as activated sludge and tertiary nutrientrnremoval systems are too costly to provide a satisfactory solution for the increasingrnwastewater problems in developing regions. Besides, these technologies do not allow forrnre-use of valuable nutrients contained in wastewater. In the present study, an aquatic plantrnduckweed (Lemna minor) was investigated as an alternative cost effective biological toolrnfor the treatment of domestic wastewater to remove concentrations of organic matter,rnnutrients and pathogens.rnDuckweed plants were inoculated into semi-batch experimental ponds to treat pretreatedrnand untreated sewage water. The experiments were conducted under outdoorrnenvironmental conditions for a period of 21 days. Composite samples were collected underrnthe duckweed mat every seven days. Efficiencies of duckweed for the treatment ofrndomestic wastewater were assessed by measuring some of the physico-chemicalrnparameters and faecal coliforms in the treated wastewater. The observations revealed meanrnreduction levels of 86.28% BOD5, 82.26% COD, 90.18% TSS, 66.07% NH4rn+, 65.26%rnTKN, 68.84% PO4rn3-, 70.58% TP, 97.67% FC for duckweed ponds with untreated sewagernand 88.14% BOD5, 86.56% COD, 91.6% TSS, 85.84% NH4rn+, 68.20% TKN, 81.01% PO4rn3-,rn74.21% TP, 98.95% faecal coliforms for duckweed ponds with pretreated sewage.rnCompared with the Provisional National Environmental Quality Standard, all parametersrnvalues of the duckweed effluents except faecal coliforms bacteria were within the standardrnlimit values set by EEPA. However, faecal coliform values fulfilled WHO guideline set tornensure safe reuse of the effluents. The results showed that duckweed can be successfullyrnused for treatment of domestic wastewater.rnKeywords: Duckweed, Lemna minor, Wastewater, Nutrient