View the 2015 fuel mix (click) for Bonneville Power Administration (BPA). In 2015, all of BPA’s power comes from renewable and fossil-free sources except for the 4.5% that comes from day-by-day topping-up “Non-Specified Sources”. We are advised that some of the Non-Specified Sources are also non-fossil-fuel sources, such that the overall BPA fuel mix is 97% fossil-fuel-free.
Download an older PDF fact sheet on Bonneville Power Association and New Utilities (click).
Find out about BPA’s resource mix in this fact sheet Measuring the Carbon Content of BPA’s Power Supply.