The answer to 'why is my water line leaking water' is that there are several common causes for a leaking water line, including corrosion, freezing temperatures, high water pressure, and damage from excavation or construction work. Symptoms of a leaking water line can include wet spots in your yard, decreased water pressure, or a sudden spike in your water bill.
If you suspect a leak in your water line, it's important to act quickly to locate and repair the issue. Small leaks can often be fixed with a simple repair, but larger leaks may require replacing a section of the water line. If you're not comfortable tackling the repair yourself, it's best to call in a professional plumber who can properly diagnose and fix the problem.