B BACKGROUND : The environment is a contributor that can affect the health of any individual, including a toddler who is quite susceptible to a wide variety of infectious microorganisms. Of the various diseases that exist in young children, there are still afairly high incidence of diarrhea in West Jakarta which includes areas "metropolitan", agovernment program to improve all aspects of the environment have been done, butwhether environmental factors associated with the incidence of diarrhea was still atoddler needs to be clearly examined again, it is necessary to recent research on therelationship of the environment with the incidence of diarrhea toddlers .METHODS : The study used a descriptive design with a cross-sectional analysis thatincluded 47 respondents ( parents toddlers ) that are in village X. Data were collected bymeans of interviews using questionnaires. Analysis of the data using the computerprogram SPSS for Windows version 17.0 and a significance level of 0.05.RESULTS : Data under five suffering from acute diarrhea in village X sample is countedwhen taken as many as 28 infants of 47 respondents, of which environmental factorshave on the correlation test showed the water source and the distance of water disposal to water source becomes a major factor causing diarrhea toddler with a significance value of 0.032 and a confidence level of 95 %. By logistic regression analysis found the effect of drinking water sources using a common dug wells is 4 times greater risk than using Jet pump. Other environmental factors such as waste disposal sites with homes (0.143), the habit of taking out the trash (.630) and the management of drinking water and type of waste to a constant value that can not connect. And all factors other than the source of the water is still above the significance value of 5 %.CONCLUSION : The relationship between the environment and toddler acute diarrheadue to environmental factors, represented by the source water wells dug in common use