Betanti Ridhosari is a lecturer at the Department of Environmental Engineering, Universitas Pertamina, Indonesia. She specializes in water, sanitation, and hygiene (WASH), hydrology, and environmental sustainability. Her research focuses on water treatment, water safety plan, and community-based sanitation, with projects funded by national and international institutions. She has contributed to numerous studies on safe drinking water access, domestic wastewater management, and environmental behaviour related sanitation. With extensive experience in both academic and applied research, she actively engages in improving water quality and public health through sustainable environmental practices.