This research proposed to treat the RO rejected wastewater in a household plant by the integrated treatment system. The possibility of wellhead water treatment by the combined treatment system of coagulation and adsorption for salinity reduction via flexible high recovery RO system was evaluated through analysis of treatment options on a laboratory scale. The naturally available gooseberry seed used as a coagulant in phase-1. It reduced 99.3% of TDS and hardness. It also increases the DO level of RO reject water, at the same time it increases turbidity and color. Turbidity and color removed by surface-modified zeolite in the phase-2. The zeolite material was taken in temperature 400ºC as adsorbent of 6 cm column achieved 8NTU in 150 mmin. The 12 cm column was achieved 7.5NTU in 150 mins. Thomas and Thomson modelling well fitted with an experimental study. The regression correlation reached up to 0.942, 0.9810 and 0.984. It is apparent from the recorded SEM patterns study. This study concludes that the coagulation by Goosperry seed produced the highest removal of TDS and hardness and in the adsorption process, with 400ºC enhances the surface morphology and porous structure indicates that heating with higher-level temperature enhances the adsorption capacity of the adsorbent material. The highest efficiency is observed in hydrothermal hotness.