People who work with environmental data—i.e.,collecting, using, and managing data—do so with purpose. They are analyzing information to answer questions or working with partners to create knowledge. They are using data to make sense of their environments, inform their programs, or advocate for policy changes. This work is often catalyzed by a climate or environmental injustice: a polluted waterway, lack of access to drinking water, or toxic air. You, as a reader, may be battling these injustices in your community, and understand why andhow data is an essential tool for action. You understand why and how you utilize data. This how-to guide zine is a tool to clarify and document those values so you can make informed decisions on organizational strategy and data sharing partnerships, as well as underscore organizational values with your team.