Customize, click on West Virginia preset and graph uses 560 gCO2/kWh to EPA's 860 for WV for Electricity (charging). Select Idaho and graph uses 310 gCo2/kWh compared to EPA's 96.
Carboncounter seem to be using the eGRID subregions, but I'm not sure how much green power actually flows from southern Wisconsin all the way to western Virginia. Maybe there's a power expert here that can comment on whether state or eGRID subregion numbers are more appropriate.
That the graph origin is not 0,0 by default and includes tax credits doesn't inspire much confidence in their impartiality.
https://www.epa.gov/egrid/data-explorer
Carboncounter seem to be using the eGRID subregions, but I'm not sure how much green power actually flows from southern Wisconsin all the way to western Virginia. Maybe there's a power expert here that can comment on whether state or eGRID subregion numbers are more appropriate.
That the graph origin is not 0,0 by default and includes tax credits doesn't inspire much confidence in their impartiality.