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Checking the pH of your reverse osmosis water is not only interesting, but it can indicate your system’s functionality and alert you to any potential problems.
For example, If your RO water has a pH level that is too high, it may indicate things are not being filtered out properly.
So, how can we best check the pH of your RO water? Read on!
You can use several methods to test the pH of your RO water, some being considerably more effective than others. The most popular are as follows.
A digital pH meter is the most accurate for reverse osmosis water pH readings.
pH strips are easy to use and can be purchased online or from a drugstore.
While litmus paper can give you a quick and easy indication of whether your reverse osmosis water is acidic or basic, for more accurate readings of pH levels, use pH strips or a pH meter.
While not super accurate, the red cabbage test is a fun thing to try at home. The color of the pigment in red cabbage changes depending on the pH level of the solution it is mixed with.
Reverse osmosis water usually has a pH ranging from 5 to 7, with a typical value of 6.5 before exposure to air and 5 to 5.5 after exposure. These levels fall within the safe drinking range and only concern individuals susceptible to gastric reflux who must steer clear of acidic beverages.
During reverse osmosis, water undergoes a purification process where alkaline minerals are stripped away. This action theoretically balances the water to a ‘neutral’ pH of 7.
However, when water is pure and carries a neutral pH, it loses its buffering capacity, which is its ability to resist changes in pH. Essentially, it becomes a sponge for any substance it can dissolve. In the case of reverse osmosis water, its first encounter is usually with air, allowing it to absorb carbon dioxide and form carbonic acid, which is mildly acidic.
Despite this, there’s a silver lining. The water remains primed to absorb other substances, which may increase the pH levels. This means it can be easily remineralized using a remineralization filter or mineral blends.
If you have any questions about testing the pH of RO water please don’t hesitate to leave a comment below!
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