This study investigates how greenwashing affects purchase intention in Indonesia’s bottled water market, focusing on Le Minerale’s disposable gallon. It addresses gaps in prior research by analyzing the mediating roles of brand reputation and green skepticism. The goal is to determine whether greenwashing directly reduces purchase intention or operates indirectly through these mediators. This research uses a quantitative approach with a judgment sampling method, where participants must be familiar with Le Minerale and aware of environmental issues. Data from 101 valid responses are collected via an online questionnaire and analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM) to assess the relationships between greenwashing, brand reputation, green skepticism, and purchase intention. The findings showed that greenwashing a negative but insignificant effect on purchase intention. Furthermore, the relationship of greenwashing to purchase intention mediated by brand reputation was significant. However, green skepticism failed to mediate the relationship between greenwashing and purchase intention. This research addresses a gap in current literature by integrating brand reputation and green skepticism as mediators in the greenwashing and purchase intention relationship. By focusing on Le Minerale’s controversial environmental claims, the study offers original insights into consumer perceptions of greenwashing in the Indonesian context and a more thorough understanding of how purchase intention may be impacted by false environmental claims. This research will contribute to the existing literature by providing a clearer understanding of how greenwashing influences purchase intention, both directly and indirectly through brand reputation and green skepticism. The findings may assist businesses in recognizing the risks of greenwashing and its direct effects on purchase intention, as well as its indirect effects on brand reputation and green skepticism, both of which can influence purchase decisions. Future studies might explore other industries such as electronics, fashion, or cosmetics to compare consumer responses to greenwashing. Additionally, researchers are encouraged to investigate other potential mediators and moderators, and to apply diverse research methods to gain deeper insights into how greenwashing influences purchase intention.