evidence: If water is too alkaline or acidic, it may damage pipes and appliances and is usually unhealthy to consume. Acidic water usually has a metallic taste due to the increased iron and manganese content. Water's pH naturally ranges between 6.5 and 8.5 on the pH scale, which is normal. If the pH of water drops too far outside this range, it may be unsafe to drink and carry potential health risks. [...] Ask the Doctors – Is water with a high pH safe to drink?: https://connect.uclahealth.org/2018/08/31/ask-the-doctors-is-water-with-a-high-ph-safe-to-drink/