U p until this point, domestic wastewater has commonly been left untreated, leading to water pollution. Therefore, there is a need for ecologically conscious waste treatment methods that do not pose additional risks to the environment. The objectives of this research were to analyze the characteristics of household wastewater (referred to as grey water), evaluate the efficiency of artificial wetlands employing Salvinia rotundifolia, and study the decomposition kinetics. This investigation employed a household-scale horizontal flow artificial wetland system with a volume of 0.135 m3, utilizing gravel and sand as continuous filtration media. The process of acclimatizing the plants was gradual, culminating in an 8-day steady state. Residence times of 0, 3, 6, 9, and 12 days were applied. Removal efficiencies in plant-free reactors were found to range between 17.20% and 74.74% for COD, 33.29% and 65.04% for BOD, 37.10% and 78.38% for TSS, 32.68% and 46.43% for phosphate, and 4.00% to 8.25% for nitrate. In reactors with vegetation, the removal efficiencies ranged from 23.40% to 84.38% for COD, 37.93% to 72.73% for BOD, 43.24% to 85.00% for TSS, 59.47% to 65.47% for phosphate, and 10.29% to 31.08% for nitrate. The highest average values for mass removal rate (R), constant areal removal rate (kA), and volumetric removal rate (kV) were observed in reactors with plants, for parameters including COD, BOD, TSS, nitrate, and phosphate. Conversely, the lowest average values of mass removal rate (R), constant areal removal rate (kA), and volumetric removal rate (kV) were found in plant-free reactors, for parameters including COD, BOD, TSS, nitrate, and phosphate. The artificial wetland reactor with vegetation exhibited the most substantial removal efficiency, successfully reducing 85% to comply with the quality standards outlined in Minister of Environment Regulation No. 68 of 2016 pertaining to Domestic Wastewater Quality Standards.