Their "California" number is way off. Our state is much to large to be represented by a single number. I pay twice the rate listed there, sometimes 3x.
California I think varies greatly by how populated the area is. The more populated the more the price is and the less populated the cheaper the electricity is.
There are many that vary greatly. It should go down farther into county within state if you want accurate. A state just is a huge thing to put together.
Most likely there are multiple energy companies, big cities with high bills, etc. Just not one size fits all.