What Phillip said. You can always check with regulatory agencies but that may not mean they are fully accurate. If you look at at enough parks over time, the location can be a good indicator of the utilities - not fool proof.
Indiana is a give me: https://www.in.gov/isdh/22796.htm
Its almost like they were trying to serve the person prospecting parks Not saying thats what their data should be used for , but an example of a state that explicitly states this.
The reality is … while city sewer and water is preferred, if you filter wrong on the front end, you might throw out good prospects. Or say you have a well deal but can connect on city water. Is that something you’d consider? I pretty much well try to take as inclusive as an approach as possible… If you throw to many filters, you risk not having enough prospects and also , potentially, wrongfully tossing out a deal.
Good luck .