For example, Santa Clara runs their own public utility[2]. The average resident pays about 10.4 cents per KWh. That's about 30 percent less than rates PG&E charges.
Also, their energy is greener and their infrastructure is better maintained.
The problem with for profit utilities is that they are incentivized to keep things as lean as possible. They neglect maintenance of their infrastructure and use that money for bonuses and dividends. You can see that played out here [1].
[1] https://www.sfgate.com/bayarea/article/PG-E-diverted-safety-...