Abdimas Umtas: Jurnal Pengabdian Kepada Masyarakat LPPM-Universitas Muhammadiyah Tasikmalaya Volume: 4 Nomor:2 E-ISSN: 2614 - 8544 Environmental Improvement Drainage To Prevent Chikungunya Mosquito Nests In Rw 01 Kelurahan Nagasarari, Cipedes District, Tasikmalaya City Indra Mahdi 1) , Empung 1) , Hendra 1) , dan Oka Agus Kurniawan Shavab 2,a) , Albi Muhammad Fauzi 3) , Taufik Ibrahim 3) , Suci Panatagama Setiawan 3) 1 Lecturer of Civil Engineering Department, Faculty of Engineering, Siliwangi University 2 Lecturer of History Education Department, FKIP Siliwangi University 3 Students of Civil Engineering Department, Faculty of Engineering, Siliwangi University a) Corresponding Author: okaaks@unsil.ac.id Abstract The objectives of this service activity are as follows: 1). Increase public understanding of the dangers of chikungunya mosquitoes and their solutions, 2). They were suppressing the spread of chikungunya mosquitoes through fogging and implementing the recommendations for the Eradication of Mosquito Nests (PSN) in the surrounding environment, 3). They are creating a drainage prototype to prevent chikungunya mosquito nests which can be used as examples for making the next prototype, 4). Increase community participation in suppressing chikungunya mosquito nests through the construction of drainage channels, 5). Improve a clean culture in maintaining the cleanliness of the drainage in the surrounding environment. The planned activities to be carried out are in collaboration with the local health center, and the Tasikmalaya city health office to reduce the number of chikungunya mosquito nests and, together with the community, build good drainage channels. The method of activity used is by bringing in experts from puskesmas, health offices, and unsil academics. Next, an approach is taken in solving problems through the 5W 1H strategy, which is solving problems from the questions: what, who, where, when, why, how. The solutions to the problems found in the field are as follows: 1). Provide a stimulus with the construction of a drainage system in accordance with the rules of the Public Works Department, 2). Cooperating with the Cigeureung Health Center by providing chemicals for fogging, 3). Counseling with the Health Center and the Tasikmalaya City Health Office regarding the dangers and solutions of diseases originating from chikungunya Keywords: Drainage, Mosquito Nest, Chikungunya Mosquito INTRODUCTION Nowadays, there are many problems related to health, especially in Indonesia. Increased number of communicable diseases (re-emerging diseases), non-communicable diseases, and degenerative diseases. Infectious diseases are still the cause of the high morbidity and mortality of the Indonesian population. Efforts to eradicate and control infectious diseases often experience difficulties because of the many factors that influence the spread of these infectious diseases (Soedarto, 2009). One of the infectious diseases that need attention is chikungunya, whose number of cases tends to increase, and its spread is wide and tends to cause outbreaks (Directorate General of P2PL, 2012). Chikungunya fever is relatively less dangerous and less fatal than DHF. Chikungunya fever is a self-limiting disease. However, the consequences of chikungunya fever are quite detrimental, and the patient can experience paralysis. Paralysis in cases of chikungunya fever is only temporary as an effect of the viral breeding process in the blood, which causes feelings of pain in the bones and joints, making it difficult to move the limbs. Although it does not mean total paralysis, work productivity and daily activities practically stop (Amirullah et al., 2011). The location of the spread of this disease is not much different from DHF because the vector of the chikungunya virus is the Aedes mosquito and is commonly found in tropical and subtropical areas. In the rainy season, the incidence of infection often occurs because the conditions are suitable for the development of mosquitoes. This causes an increase in the number of mosquito populations as virus vectors, thereby accelerating the spread of diseases found in rural and urban