When I was a kid, we owned a house out in a small farming community in western Washington State. One of the things we had to do is drill the well a solid 100 fe

When I was a kid, we owned a house out in a small farming community in western Washington State. One of the things we had to do is drill the well a solid 100 feet below the water table, because the upper 60 feet had measurable levels of fecal coliform bacteria. This was fairly rural. Our nearest neighbor was a quarter mile up the road, and we were surrounded by livestock pastures with cattle herds. I would imagine the current owners of the property have had to re-drill the well at least once as population density in the area increased.