This paper analyzes the impact of country disclosure on the firm value of listed companies in Viet Nam. As the sharp increase in population and urbanization has led to the depletion of water resources, the issue of water management is having an impact on the sustainable development of businesses. These days stakeholders and investors are taking this issue more and more seriously, which leads to a business disclosing country information that has a positive effect on their firm value. We use the quantitative method through instrumental variables for a sample of 170 companies listed on the Ho Chi Minh Stock Exchange and conducted from 2015-2019. The results of our study have shown that there is a positive influence of information disclosure on corporate governance. Our research aims to provide additional information for the current literature by providing further evidence for the field and suggesting solutions for governments, stakeholders and companies.