4e3eafac_ell_Water_Treatment_Strategies__What_it_does
[Treatment process] pH correction [Contaminants Removed/Altered] Usually does not technically remove anything; alters water chemistry-except via air stripping (see below). Controlling low pH often reduces levels of leached copper and lead in plumbing systems. [What it does] 
By dissolving an alkaline (basic) material into water, low pH (<6.5 units) can be adjusted to prevent corrosion. Often accomplished with a calcite filter/contactor which uses clean lime to correct pH. Sometimes high pH's are controlled by acid injection. This may be done for scale control, though very seldom in our service area.
Well Water Treatment Strategies
What it does