Underground water leaks can occur at any time of the year. If you have gray or blue plastic pipe coming up from the slab into your mechanical room you should be concerned. Pay attention to your water bill and make sure you look at your water consumption every month.
If you have a sprinkler system you obviously will use more water in the summer. Make sure to have that checked for underground leaks.
Other problems that could raise your water bill would be
- toilet problems
- dripping shower
- dripping faucets