Washington voters passed [http://www.secstate.wa.gov/elections/initiatives/text/I937.pdf Initiative 937] in 2006, creating a [http://www.dsireusa.org/incentives/incentive.cfm?Incentive_Code=WA15R&re... renewable energy standard] and an energy efficiency resource standard for the state's electric utilities. Initiative 937 calls for electric utilities that serve more than 25,000 customers in the state of Washington to undertake all cost-effective energy conservation. Investor-owned utilities, municipal utilities, rural electric cooperatives and public utility districts which meet the customer total requirements are subject to this standard. Of Washington's 62 utilities, 17 are considered qualifying utilities, representing about 84% of Washington's load.
The law specifically requires the affected utilities to identify achievable cost-effective conservation potential for the next 10 years by January 1, 2010, and every two years thereafter. In determining target levels of efficiency, a utility's projections must be consistent with its proportionate share of the most recent Northwest Power and Conservation Council ([http://www.nwcouncil.org/ NWPCC]) power plan. Utilities may alternatively base their efficiency targets on their most recent integrated resource plan, provided the plan is consistent with the NWPCC's power plan. Utilities must also develop projections of achievable cost-effective conservation potential for the immediate two-year period.