Where does water go after you wash your hands?
The water flowing down your sink has a longer story than you might expect. Inside the Jungnang Water Reclamation Center in Seongdong-gu, the Seoul Sewerage Science Museum reveals the infrastructure that normally stays out of sight. Built on the former Cheonggyecheon sewage treatment site, it explains how sewers protect public health and urban waterways.
From history to microorganisms
The first-floor displays explore the history of sewer systems, the structure of pipes and the journey of wastewater through treatment. Cleaning wastewater involves more than simply screening out solids: microorganisms help break down pollutants. A Seoul Metropolitan Government report published in April 2026 also describes recovering useful resources and energy from the treatment process.
Hands-on learning upstairs
The second floor has been described as a space where children can engage with water cycles and treatment through interactive exhibits. A city field report also mentions an upper outdoor deck overlooking parts of Jungnang Water Reclamation Center. Current access to interactive areas and the deck may vary; follow on-site guidance.
Before you go
Seoul's 2025 visitor article listed the address as 64 Jadongchasijang 3-gil, Seongdong-gu, Seoul; hours Tuesday–Sunday, 09:00–17:00; closures on Mondays, January 1, Lunar New Year's Day and Chuseok Day; and free admission. It described general exhibition visits without advance reservations, while guided tours and programs may require separate bookings. These details are historical published guidance, not a guarantee of current availability. Search for the original Korean name, 서울하수도과학관, in a Korean map app and check the museum's latest notices.