Shelf Life of Bacteriostatic Water: Does It Really Expire? 24 7.is Your eyes are your first line of defense. Good BAC Water: Crystal clear, odorless (faint alcohol scent), and painless. Bad BAC Water: Cloudy, particulate matter, strong chemical smell, or severe burning. Does Water Expire? Shelf Life, Safety, and Smart Storage Explained The Environmental Blog Bacteriostatic Water for Steroids: Safe, Sterile Injections Made Easy Bottled water often carries an expiration or best by date, but pure water itself does not expire or spoil, as it lacks nutrients for bacteria growth. The date primarily concerns the plastic bottle: Should I toss an unopened BAC water vial that expired a year ago? : r Peptidesource