Not sure what you’re asking. If you’re talking about privately-owned utilities that are traded on the open market, you’ll have to research the individual companies. But man, what a racket, huh? They get the state to grant them monopolies over huge swaths of real estate, and they can just charge whatever they like, because the people have no one else they’re allowed to buy from! And then if they decide they really don’t want to use those utilities after all, well, the state can just kick them out of their homes!
If you’re talking about actual public utilities, like roads and stormwater drainage, I’m pretty sure your investment is your property taxes.