Researchers in Indonesia studied how to improve the treatment of brackish water in coastal areas to make it safe for drinking. They used a combination of Ultrafiltration (UF) membrane with an air lift system as a pretreatment before Reverse Osmosis (RO) membrane. This method helped to stabilize the water flow, reduce membrane fouling, and produce high-quality drinking water. The UF-PS membrane system with RO membrane at low pressure successfully removed 96-98% of dissolved solids and 99-100% of color from the brackish water. This approach could be a cost-effective and efficient way to provide clean drinking water in Indonesia's coastal regions.