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Signs of acid water are corrosion of fixtures, blue staining (from copper pipes) or rust staining) from iron pipes. Common causes for acidic water are acid rainfall due to atmospheric carbon dioxide and other airborne pollutants, runoff from mining spoils and decomposition of plant materials.
The pH of pure water is 6.5 – 7. Water lower than a pH of 7 is considered acidic. In general, a water with a low pH could be acidic, soft, and corrosive. When acidic the water could leach metals ions such as iron, manganese, copper, lead, and zinc from plumbing fixtures, and piping. These also can show up as having a metallic or sour taste, staining of laundry, and the “blue-green” staining of sinks and drains. The primary way to treat the problem of low pH water is with an acid neutralizer. The neutralizer feeds a solution into the water to prevent the water from contributing to corrosion.
