California’s Public Utility Code § 701.1(c) gives the state’s Public Utilities Commission a mandate to include “a value for any costs and benefits to the environment,” when it is “calculating the cost-effectiveness of energy resources, including conservation and load management options.” The Commission has put forward a proposed decision requiring utilities to use the IWG’s Social Cost of Carbon estimates for a Societal Cost Test in Integrated Resource Planning. The staff proposal recommends that the CPUC adopt both the catastrophic, high-impact (95th percentile) and average values of the Social Cost of Carbon, which would be $123 and $42 per metric ton of CO2 e.