Why is spring water bitter and sweet?

Bitter springs are mostly distributed in internal flow areas with large evaporation, such as deserts, Gobi, barren hills, or seaside and salt lakes. These springs are often distributed in low-lying places, and their taste is mostly bitter and salty.

This is generally related to its formation and the high salinity of the land there. There are many reasons why water is bitter, such as: the content of soluble solids (bicarbonate, chloride and carbonate of calcium, magnesium and sodium) in water is high, that is, the hardness can produce bitter and salty taste; When the zinc content in water is high, the water is turbid and has a metallic astringency; When the sulfate concentration in water is high, the water has an odor and has a laxative effect.

Sweet spring water is generally located in the mountainous area or piedmont plain in the outflow area. These waters contain relatively few sodium ions and potassium ions, so the taste is relatively good.