A renewable portfolio standard (RPS) aims to ensure a market for the power produced by renewable energy providers, mandating a target and letting the market decide what technologies are deployed. As of September 2009, 29 states and the District of Columbia have implemented RPS policies, and five additional states have set non-binding renewable energy goals.

This graphic is an updated version of a figure which originally appeared in WRI's publication Juice from Concentrate. It reflects information provided by The Database of State Incentives for Renewables & Efficiency (DSIRE) as of September, 2009.