The increasing demand for safe drinking water and the growing environmental concerns associated with chemical coagulants have encouraged the exploration of sustainable alternatives for water treatment. This study investigates the effectiveness of Moringa oleifera seed powder as a natural coagulant for turbidity removal and proposes a tablet-based dosing approach suitable for household-scale applications. Jar test experiments were conducted using varying dosages to determine the optimal coagulant concentration for different turbidity levels. To enhance practical usability, standardized 1 g tablets were developed for simple and controlled dosing. The results show turbidity removal efficiencies of up to 88.9%, reducing turbidity to permissible limits of IS 10500:2012 (1–5 NTU). A compact prototype integrated with a turbidity sensor was also developed to provide real-time measurement and dosage recommendation in the form of tablets. A correlation between initial turbidity and tablet dosage was established. The findings demonstrate that tablet-based Moringa oleifera coagulation can provide an effective, low-cost, and environmentally sustainable alternative to conventional alum-based treatment for household and rural water purification systems.