Seriou leak

I think my toilet is leaking but I can't find the leak. the toilet is in the center of the damaged area but there is no water on top of the floor. It is only soaked subfloor. There is no water leaking from any of the pipe connections nor from the valve. There is no smell so I am assuming it is clean water. I think it is a city water problem because the pump does not cycle. I have a lot of repairs to do but it is useless until I repair the leak and I am on the road not expecting to be landed at a place I can work on it for about two months. Any ideas on how I can either blame the toilet or eliminate it as the source of my leak? I could replace the valve, the seal, the flange or the entire toilet but if that is not the source it is wasted effort, not including the money