The deepest spot of Lake Wentworth was explored by divers decades ago. A visible layer of debris--maybe mostly bacteria--separated the bottom 20 feet from the water above. I speculate the bottom area is salt water, dissolved from winter road salt.
Fresh water floats atop saltwater, creating a "freshwater lens" using
hydrology parlance.
If practical, this presumably-contaminated lake water could be plumbed from the deepest pocket of Lake Winnipesaukee to be sent down the Merrimack River to the ocean.
