Click an area in the map to explore.
Grid regions are colored by the current value of the marginal carbon emissions in that region.
0-1000 lb CO2/MWh
1000–1800 lb CO2/MWh
1800–2200+ lb CO2/MWh
Data not available right now
All times are shown in UTC.
Want marginal carbon emissions time series data? Contact WattTime to learn more.
Each colored area is a different balancing authority.
Balancing authorities help run the grid by making sure that the supply and demand of electricity are always matched.
Your balancing authority may be the same as your utility, or it may be a different company.
Marginal emissions are what you can change about how polluting the power grid is.
In other words, it's the specific CO2 emissions from the power plants that you can turn up or down by using or conserving energy.
We estimate this by crunching a bunch of public data using our propietary statistical model.
Average emissions are what's happening overall with emissions from the power grid.
In other words, it's the combined CO2 emissions from all the power sources on the grid, even the ones you can't change.
We calculate this from power source data, if it's available.