This study investigated constraints to environmental hygiene practices among boarding students in Awka-South L.G.A of Anambra State. Three research questions and two hypotheses guided the study which adopted descriptive e survey research design. The population for this study consisted of the 5336 boarding students (2,348 male and 2,988 female) in the 10 secondary schools in Awka-south Local Government Area of Anambra State. A multi-stage sampling procedure was adopted to draw the sample size of 800 boarding students. A questionnaire designed by the researcher entitled: “Constraints to Environment Hygiene Practices among Boarding Students Questionnaire (CEHPABSQ)” was used for data collection. The instrument was properly validated and a reliability index of 0.76 was obtained using Cronbach Alpha. Data generated were analysed with mean and standard deviation to answer the research questions while z-test was used to test the hypotheses at 0.05 level of significance. Results of the study revealed that constraints to environmental hygiene practices to include inadequate provision and maintenance of sanitary facilities by school authorities with aggregate mean scores of 2.90 > 2.5 criterion mean. Based on these findings, it was concluded that school authorities and parents should address environmental constraint without any compromise for promotion of good health of the students. Based on the conclusion the following recommendations were proffered; school authorities should ensure that there is constant water supply in their schools for good environmental hygiene practices.