Residual mix

The residual mix is the grid attribute (emission, radioactive waste, etc.) average that is not allocated to a specific individual or end-consumer.  If a consumer uses grid electricity without the cancelation of a GO certificate (or other reliable tracking mechanism) than they are obligated to use the residual mix when calculating/reviewing their consumed electricity attributes (footprint).  Organizations that are part of the European E-Track program, like Reliable Disclosure Systems for Europe ( calculate the national residual mixes annually.