Acidity

Acidity is one of the quality elements of water. Acidity is expressed on a pH scale where the value of neutral water is 7. Fresh waters in Finland are usually slightly acidic (pH 6.5 to 6.8). Seawater, on the other hand, is slightly alkaline (pH approx. 8). Groundwaters in Finland are usually slightly acidic (pH 5.9 to 6.9).