Tegalsari Urban Village is one area that is located right in the heart of Surabaya. This area is directly adjacent to one of the famous shopping centers in the city of Surabaya, Tunjungan Plaza. The densely packed and densely populated residential area is located right behind the plaza. Many boarding rooms were built to meet the occupancy needs of workers in the plaza causing a narrow and cramped residential area. Around the settlement flowed a tributary stream, which stretched along the city of Surabaya. It is this tributary flow that is functioned by the Tegalsari village community to dispose of sewage, garbage left over from human activities and feces. Although Tegalsari residents already have a decent bathroom and toilet, they do not have a septic tank as a requirement for a healthy toilet. Around 2015, the Tegalsari area received a healthy sanitation program intervention by the Korean HFh and HFh Indonesia. This program succeeded in building 250 family healthy latrines (construction of family toilets and construction of septic tanks for those who do not yet have it), and succeeded in makling Tegalsari village area 100% free from open defecation for the Surabaya city area. This proud achievement cannot be separated from the collaboration of HFH Korea, HFH Indonesia and the local Puskesmas where Habitat undertook the process of building its physical facilities while the local Puskesmas conducted a training process and increased public awareness of the importance of healthy hygiene behavior.