Our Saint Peter School was invited to the lake purification event using eco enzymes on the 5th of June 2024 on account of World Environment Day at BCBD Sumarecon Bekasi. Encouraging students to participate in external events related to eco enzymes can deepen their understanding and commitment to sustainability. Participation in such events allows students to share their knowledge, learn from others, and see the broader impact of their actions for a cleaner and greener future. (Results of the treatment are attached).