What is the big STEM idea you want to share with us?
Where are the freshwater sources in your immediate surroundings (for widest participation, this could be walkable distance? Discussion welcome)?
This is a mapping project. I suggest that anyone who wants to participate could take a photo of the site, describe whether access is public or private, and register the location using the geolocation from the phone. Of course, other information is useful, such as the kind of resource, a spring, pond, or borewell.