That would make reverse osmosis water with a pH of 6.5 10 times more acidic than unfiltered water with a pH of 7.5. Pure water has a pH of 7.0 to 7.5. Not only is the pH of reverse osmosis water in the healthy range of 5 – 7, RO water treatment provides the highest quality and best tasting drinking water. For comparison, milk has a pH of 6.5 and coffee comes in around 4.0 to 6.0. Before you panic and start telling all your friends to rip out their reverse osmosis systems, though, it’s worth taking a look at the pH levels of other substances: Lemon Juice (pH… Some countries have regulations governing the pH of drinking water. RO water has a pH of 6.0 to 6.5. Typically, the water being produced by reverse osmosis technology is between 6.0 – 6.5 pH. Reverse osmosis is a water filtration method that removes toxins, microbes, debris, lead, and minerals from tap water. In other words, reverse osmosis … Coffee, tea, fruit juice, carbonated drinks, and even milk have lower pH, which means they are more acidic than water from a reverse osmosis … Reverse osmosis water is slightly more acidic than pure water. If you see that your pH is below 7 with a good amount, you can consider putting a pH increaser filter as a final stage of your reverse osmosis system and correct your acid water problem easily. So RO product water … Typically, the pH … .....Reverse osmosis membranes do not remove gasses, such as carbon dioxide in water. Is Ro water acidic? Also, when RO water is exposed to the air, a small amount of carbon dioxide will begin to dissolve in the water. Reverse osmosis water is healthy for drinking.