Abstrak — Pengelolaan sampah rumah tangga merupakan isu penting dalam upaya menciptakan lingkungan permukiman yang berkelanjutan. Pengelolaan sampah rumah tangga memerlukan pola penanganan yang tepat. Upaya penerapan prinsip Reduce, Reuse, Recycle (3R) dalam pengelolaan sampah rumah tangga juga merupakan salah satu pendekatan yang populer di Indonesia. Kabupaten Sleman sebagai salah satu bagian dari Kawasan Perkotaan Yogyakarta (KPY) merupakan salah satu daerah yang berusaha menerapkan prinsip 3R dalam pengelolaan sampah rumah tangga. Penelitian ini menggunakan pendekatan studi kasus untuk mengukur hubungan antara pengetahuan tentang pengelolaan sampah rumah tangga berdasarkan prinsip 3R dengan sikap dan praktik yang dilakukan oleh masyarakat dalam pengelolaan sampah berbasis 3R di Kabupaten Sleman. Jumlah responden dalam penelitian ini adalah 300 responden yang merupakan kepala keluarga yang tinggal di Desa Sinduadi dan Sendangadi, Mlati, Kabupaten Sleman. Dataset dari hasil pengumpulan kuisioner diolah dengan menggunakan pendekatan Polytomous universal Model (PLUM) Model. Hasil penelitian menunjukkan bahwa ada hubungan antara aspek pengetahuan dengan sikap dan praktik masyarakat dalam pengelolaan sampah rumah tangga berbasis 3D. Kata kunci: sampah rumah tangga, 3R, PLUM

The urbanization process has caused several problems, such as clean water, environmental degradation, and waste management, especially in the peri-urban area. The solid waste management system is a type of basic urban infrastructure that often faces the problem of overcapacity in the peri-urban area. To deal with this problem, the concept of reducing and recycling household waste becomes an alternative to reduce the burdens to the municipal solid waste management system. The concept of reducing and recycling waste is well known as the 3R principle (3R) which consists of reduce, reuse, and recycle waste.This research is intended to measure the level of knowledge, attitude, and practice of the household towards the 3R Principle in the peri urban area in Sleman, Yogyakarta. As the part of Yogyakarta Conurbation Area, the peri-urban area in Sleman often faces the problem of household solid waste management. This research compares the level of knowledge, attitude, and practice of the household in urban and peri-urban areas. A set of questionaire was used as the data collection instrument to measure the knowledge attitude and practice towards the application of the 3R principle among households in the Mlati District as part of the Yogyakarta Conurbation Area.This research shows that despite a high level of knowledge and attitude towards the 3R Principle, it was not in line with the practice of this principle in household solid waste management. The lack of awareness regarding citizen participation in the household waste management system and the problem in the household waste collection is seen as the most important factor that makes the 3R principle could not be well-applied in the case study area.