Proper valuation of harmonic injections and distortion is critical if an efficient solution is to be provided for any harmonic problem, which may exist. Indeed without proper tools to value harmonic distortion, it is not possible to quantify the extent of any problem. This paper demonstrates that is possible to develop marginal prices for harmonic injections, which will accurately reflect the value of the injections to the rest of the network. Given an allocation of harmonic pollution rights these prices act to coordinate each member of the network to act in a globally optimal manner.