Wiktionary
potability
n. The quality of being potable
Usage examples of "potability".
Pinch said, drawing out a small vial which Tagetarl knew contained one of those invaluable powders that most long-distance travelers carried to check the potability of stream water.
Caris Yard is empty, and the old pump now bears a warning sign about its potability, although I bury my face in its musty gush and drink and drink from it, and then look around.
These samples are animals, bred for docility, production, and potability of flesh.