* Freshwater is generally characterized by low levels of dissolved salts and minerals.
* Acidity is measured on the pH scale. A pH of 7 is neutral, below 7 is acidic, and above 7 is alkaline (basic).
Highly acidic water would have a low pH, typically below 4.5. This acidic water would likely contain dissolved acids, such as sulfuric acid or nitric acid, which are produced by things like acid rain or industrial pollution.
Therefore, highly acidic water would not be considered freshwater because it would contain significant amounts of dissolved substances that would make it unsuitable for many uses.
Important Note: While freshwater can be slightly acidic (with a pH slightly below 7), it is generally considered fresh water when its pH is within a certain range, typically between 6.5 and 8.5.
