Well since you decided to delete the information where we asked WHERE this was all taking place, we would have no idea.
Most likely unless the municpality would allow you to forgo paying the tax, it's unlikely you can get out of it. Getting excluded from a covenants/HOA is an entirely different thing that vacating tax. Further, it sounds like you aren't really moving the property out of the district just that you want to not pay taxes because you aren't planning to use them. First off, if municipal sewer/water is available, you may not even be legally allowed to put in a private septic system. Second, just because you don't care to use a service is not usually a basis for getting out of paying a tax, even one for a special purpose. I don't use mass transit, but I get stuck with a regional tax for that, etc...

