This is an open-source downloadable tool that has been developed with community-led citizen science projects in mind. It is part of Citizen Sensing: A Toolkit, a collection of 25 methods and tools that can be used in citizen science projects.The Community Level Indicators (CLIs) tool is designed for community members and citizen science practitioners wanting to start a new project and is designed to be used throughout a citizen science project. The CLI method involves asking community members to identify extra information that a community in a citizen science project can collect to complement and contextualise sensor data. For example, if a community is concerned about air pollution in their area, they might start a campaign to reduce the n...