Sustainability needs to be a prioritization of museum maintenance moving forward in order to protect cultural heritage, the structure of the museum, and its integrity. This means being aware of and improving upon shortcomings that prevent museums from being sustainable. This work acts as a case study for evaluating the extent to which museums in Philadelphia meet sustainable goals outlined by an Environmental, Social, and Governance (ESG) investment framework. While the word sustainability is commonly associated with the environment, various social and administrative assets are also considered in evaluating how each museum interacts positively (or negatively) with its community, which ultimately contributes to museum longevity. These data are evaluated by in-person museum visits, where monitoring is performed based on an ESG-based sustainability metric checklist. As a result of this monitoring, it can be inferred that some museums operate more sustainably than others, though there is great variation in performance aspects. Even if some museums have shortcomings in some metrics but strengths in others, Philadelphia museums must be aware of and respond to sustainable needs, especially to protect both cultural heritage and the visitor audience. Many of the weaknesses these museums face rely on lack of transparency in interpersonal relations with societal and political stances as well as data clearance; in addition, many systems infrastructures should be upgraded, especially since emissions and energy data are not available to analyze.