Bangkok residents consume over 600,000 plastic items a day resulting in consequences affecting Thailand’s economy, human health, and environment. Partnered with the St. Joseph’s Alumnae Association (SJAA), our project sought to gain an understanding of plastic use and develop methods to reduce plastic consumption in the St. Joseph Convent School (SJC) and its community. We accomplished this by surveying stakeholders and interviewing plastic reduction programs. Our project investigated the reasons for plastic consumption, system limitations that prevent reducing plastic use, and the strengths and weaknesses of programs. We recommended a long-term action plan to SJAA that included sustainability curriculum, alternative materials, a plastic ban, and methods for continued success.