“I had the water service disconnected at our vacant property. The Township is still charging me for service, is this legal? (no sewer, just water) They say it is.”
What makes you think it isn’t legal? I’m assuming they are charging you a base fee for the existence of the service, and not a per-gallon charge for measured use. In the same way that a town can make you pay for the schools even if you don’t use them, it can make you pay for municipal water service even if you don’t use it.
It may not be permissible under the specific laws in a particular area, but there’s nothing that stops a town from having that sort of system. If your town does, you get to pay for the water service.