Then you live on the edge of a massive meteor strike many millions of years ago. Is your well water salty?
...No, well, yet. The water out of the tap in the city of Chesapeake two years ago was salted. After the the storm last year, the ground water was purified. (the salt water was diluted.) But, when I turn the tap on, a piece of meteor for my rock collection would make my day. I hear some of the fragments from eons ago appear in glacial melt. If you catch some when that ten ton cube falls, save me a chunk...