In the prevention or decreasing of environmental problems, attitudes and awareness of people have been significant. First of all, primary school teachers' awareness and tenderness on this field should be improved. In this study, the awareness of preservice teachers in primary school teaching department on environmental problems is aimed to be declared. This study has been conducted in 2015-2016 semesters. As for research method, in this study, the descriptive model that is a kind of quantitative research method has been preferred. In this sense, 1.,2.,3., and 4. grade university students in 4 different universities in Turkey, totally 742 students, have been determined as the sample of this study. The data of this study has been analyzed via SPSS program and the findings of this study have been presented as related to the aims of this study. As a result of this study, it has been found that the awareness of the students on the environmental problems has been seen as 74%. Additionally, it has been declared that the students in this study have been answered correctly the questions on "knowledge" step as 69%; they answered correctly the questions on "comprehension" step as 81%; the questions on "practice" step have been answered correctly for 81%; on the "analysis" step, there have been 81.5% of the students who have been answered the questions correctly; on the "synthesis" step, there have been 66.6% of the students who could answer the questions correctly and finally the questions in "evaluation" step have been answered correctly by 73% of the students.