The answer to 'why is my water line leaking water' is that there are several common causes, including a crack or hole in the pipe, loose fittings, high water pressure, and freezing temperatures. Signs of a water line leak include wet spots on the ground, low water pressure, and unexpectedly high water bills.
To fix a water line leak, you may need to locate and repair the damaged section of the pipe, tighten fittings, or adjust the water pressure. Smaller leaks may be possible to fix yourself, but larger issues or leaks in hard-to-reach areas often require a professional plumber.