Twenty-three states have enacted renewable portfolio standards.
In 2005, Delaware, Illinois, Montana and Vermont enacted RPS laws and Texas expanded its highly successful RPS law. Twenty-three states (AZ, CA, CO, CT, DE, HI, IL, IA, ME, MD, MA, MN, MT, NV, NJ, NM, NY, PA, RI, TX, VT, WA, WI) have enacted RPS laws. Due to the popularity of these laws, nine percent of the energy consumed nationwide comes from renewable sources.
9