If you're fraking your significant other, I doubt that'll do any damage to the water table, unless you produce volume like Peter "Two Quarts" North, in which case there's a slight risk of organic contamination.
As for hydraulic fracturing, there is no such thing as "drinking-water-safe", just like there's no such thing as "clean coal". Cracks in the bedrock resulting from the frackage can propagate for thousands of feet above the well pipe, often unpredictably. That's kind of the point; the longer the cracks, the more gas-bearing rock is opened for collection in the well. Even if the well is drilled far below the water table, the cracks can still reach it, thus allowing hydrocarbon gases to enter and poison the water. Then there's the risk that the well casing can fail at the point where it crosses the water table, thus releasing gas and "frack fluid" (which is significantly more toxic than your "frack fluid" referenced above) into the environment.