The study aimed to determine the level of environmental awareness and practices among senior high school students, to create an intervention plan based on the results of quantitative analysis. A descriptive-correlational research design was employed, involving 320 senior high school students selected through stratified random sampling from four public secondary schools in Pantukan. Two adapted and validated questionnaires were used for data collection, and statistical tools such as mean, standard deviation, Pearson’s r, and linear regression were applied. The results showed that students exhibited a high level of environmental awareness and a highly extensive environmental participation, which means it is often observed. In addition, a significant positive correlation was evident between environmental awareness and environmental behavior. These results indicate that although students have already demonstrated good environmental behavior by exhibiting high-level environmental practices attributes, it is still important to reinforce this awareness with structured programs. Based on these results, there is a need to revise a program to sustain and enhance further the level of students’ environmental practices. The plan aims to strengthen environmental awareness, encourage sustained ecological actions among senior high school students, and ensure the continuity of environmental initiatives in school and the community.