The disinfection method for POU chlorination was designed based on the use of a solution of sodium hypochlorite (NaClO). This solution is used to disinfect drinking water in households with a relatively simple setup (Figure ). The specific NaClO product used here is marketed as WaterGuard, and each bottle contains 150 mL of the NaClO solution. The treated water volume was 20 L based on the assumed container capacity. This disinfection method is designed to be relatively simple to use, where the bottle cover of the WaterGuard bottle is used to dose the NaClO solution into 20 L of raw water. An expected one WaterGuard bottle cap is a measure of a single dose of NaClO solution while two is used for a double dose. The full materials and cost inventory data for POU chlorination system are accounted for (Table ). The code of this system was designed for three influent streams, i.e., the raw water, NaClO (chlorine stream), and polyethylene (WaterGuard bottles). To keep the goal of the minimum log reduction of bacteria, the dosing of NaClO was 1.88 mg•L -1 at low turbidity (≤ 10 NTU), and a double dose of 3.75 mg•L -1 was used at higher turbidity (> 10 NTU). Algorithms were developed to capture this impact of water quality on cost and environmental impacts.