Indian Journal of Public Health Research & Development, July 2020, Vol. 11, No. 7 1437 Does Drinking Water Sources, Knowledge and Hygiene Behavior of Mother Infuence the Quality of Drinking Water for Toddlers? Septia Rini Rizki 1 , Ema Hermawati 2 , Ukik Agustina 1 , Febri Hardiyanti 1 1 Researcher, 2 Tutor, Department of Environmental Health, Faculty of Public Health, University of Indonesia Abstract Background : Clean water is one of the vital needs for human. The low availability of clean water has a bad impact on all sectors, including health. Around 3,800 children die every day due to diseases related to unhygienic drinking water access. Cholera, ringworm, diarrhea, or typhus are a small number of diseases that may arise from consuming unhygienic water. Even unsafe drinking water, poor sanitation, and hygiene behavior contribute to 88% of child deaths due to diarrhea worldwide 1 . According to World Health Organization data, nearly 1.7 billion cases of diarrhea occur in children and kill around 525,000 children under fve every year in the world 2 . While in Indonesia, there was an outbreak of diarrhea in 2018 with the number of children under fve as sufferers as many as 1,637,708 (40.90%). One of cities that has the highest diarrhea cases in Indonesia is Depok, more specifcally in Tapos Sub-district with 1,274 diarrhea cases 3 . Diarrhea in toddlers is closely related to the quality of drinking water consumed and maternal care factors. This study aims to determine whether maternal hygiene knowledge and behaviors affect the quality of toddler drinking water. Method : This study was an observational with cross sectional design. This research used questioner and the sample are mothers who have toddler who consume drinking water in Tapos Sub-district, Depok, in period of November to December 2019. The quality of drinking water is known through measurements of Total Coliform and Escherichia coli. The data analysis using Chi-square test. Result: The respondents are 100 samples, there are 62 families using groundwater (62.0%) and 38 families using refll drinking water as a drinking water sources. The results of bivariate analysis between drinking water sources and drinking water quality is 0.247 (OR 0.458-34.284), knowledge of mother and drinking water quality is 1.000 (p>0.05), while hygiene behavior of mother and drinking water quality is 0.594 (p>0.05). Conclusion: None of drinking water sources, knowledge and hygiene behavior of mother infuence the quality of drinking water for toddlers. Keywords: Hygiene knowledge, Hygiene behavior, Mother, Drinking water, Diarrhea, Toddler Corresponding Author: Ema Hermawati: ema_her@ui.ac.id Introduction Water is a natural resource that has a very important function in life, both in terms of quality and quantity. Most of human body (60%-80%) consists of water, so if there is a lack of fuids, then a person will become dehydrated or attacked by other diseases 4 . But the problem today is quality of drinking water in big cities in Indonesia still being a concern. The government has regulated the requirements for drinking water quality inside Minister of Health Regulation No. 492/Menkes/ PER/IV/2010. It explains that drinking water must be free of inorganic and organic materials. Drinking