Commonly available poly-aluminium chloride is used as a coagulant and drumstick peel powder, bagasse fly ash are used as adsorbent for the removal of malathion in the present investigation. The efficiency of the coagulation-adsorption integrated method is tested for the determination of malathion using batch experiments under controlled conditions as a function of initial pH, contact time, initial concentration and the optimization amount of coagulant and adsorbent dose. These operation conditions applied on wastewater characterisation parameter namely COD, BOD, Turbidity and TSS. Malathion [1, 2-Di (ethoxycarbonyl) ethyl O, O-dimethyl phosphorodithioate; CAS 121-75-5] is most widely used insecticide in the world for the agriculture areas. Due to its low vapour pressure, apparent biodegradability and extensive use, malathion has led to the contamination of terrestrial ecosystems and has been detected in ground and surface waters in many countries beyond permissible limits. Malathion has caused a setback to the environment and also has increased potential risk to human health as it is an endocrine disruptor chemical, hence is posing a challenge to remove the malathion from wastewater. Currently, coagulation-adsorption integrated method is an effective technique can be used to treat malathion wastewater. Integrated process is environmental eco-friendly, low cost, low energy requirement and high efficiency for pollution uptake. Coagulation-adsorption integrated method for synthetic wastewater by using drumstick peel powder and bagasse fly ash malathion removal with respect to COD, BOD, TSS, Turbidity. They were 84.05%, 97.17%, 100%, 98.53% and 76.81%, 95%, 96.66%, 96% respectively. Same processes has been done for malathion industrial wastewater by using drumstick peel powder and bagasse fly ash gave very efficient removals with respect to COD,