I recently heard a radio news factoid that half of Illinois’ electricity generation comes form nuclear power. I also heard in the past that Illinois gets nearly half of its electricity from coal. These numbers I can confirm here which shows both at about 48% with natural gas and wind filling the scraps.
But how would I go about getting more granular data than that? If I wanted to find out which sort of plant fed my house’s or businesses its base power, where would I look? (Near West of Chicago, just for an example :))