Local residents have known since the 1740s we’re sitting atop large aquifers brimming with limestone rich water. In fact, there’s an old joke that our water is so hard if you throw it at the barn window, it will break the window.
Luckily for us, water with high amounts of dissolved limestone (especially limestone with dolemite) is among the best for making whiskey. Interestingly, very similar to water makeup in large parts of Kentucky. Definitely not a coincidence the American Rye Whiskey Industry was born in Lancaster County.