We compute all of our data from publicly available data, published by electricity grid operators, official agencies, and others. We then apply various algorithms on top to calculate flow-tracing, e.g. how electricity flows between areas and how that affects the carbon emission in each area. See much more on our Methodology page.
You can click on an area to see more specifics on the origins of its data and find links to the underlying data source.
Example from the app showing data sources in Germany