The Kilcher Homestead is a 600 acre Pioneer Homestead that has been protected for perpetuity via a ConservatIon Easement. The Kilcher Family has also preserved the Historic Cabin and site as a LIving Museum.
Yes, negative pH is possible, but not in water as a solvent. The range of pH in water is 0 to 14 (to be more precise, it is -1.7 to 15.7, but for simplicity's sake, we start with the usual values.) Thus, what pH indicates is the ability of the acid to form H3O+, which can then donate a proton.
Your question is confusing, since you state the answer in your question. Alkaline water, with a low pH, is high in negative ions, such as OH. Acidic water is high in positive ions, such as H. Acidic water (pH 4-6) is carrying positive charges and alkaline water(pH 9.5) is carryiing negative charges.