What is the pH of witch hazel? The United States Pharmacopeia (USP) states that the pH of genuine witch hazel can range between 3.0-5.0. Shannon22023-10-19T09:28:01-04:00October 18, 2023| Share This Story, Choose Your Platform! FacebookXRedditLinkedInWhatsAppTelegramTumblrPinterestVkXingEmail