This is awesome. Two orgs come to mind that you might want to work with in some capacity: Electricity Maps for sourcing US electric grid carbon intensity data [1] (unfortunately, granularity is only down to the ISO/balancing agency), and Clear Loop (a division of Silicon Ranch, one of the largest solar developers in the US) [2], which uses carbon credits to build clean energy projects in the most carbon intensive parts of the US grid.
[1] https://app.electricitymaps.com/map/72h
[2] https://clearloop.us/projects/