Naturally filtered water is purer than water filtered by other methods. However, it still contains some dissolved minerals depending on what the water has flowed through, such as stream water, still lake water, and water that has passed through layers of soil and rock.
Some dissolved minerals in water can be harmful to health. Generally, people prefer to drink mineral water because of its pleasant taste. However, if the mineral content in water is too high, it’s similar to chemical contamination,
making it unsafe for daily consumption.

Iron in Water:
Iron is a naturally occurring metal in igneous rock and sandstone. Current research doesn’t address the level of iron in water and its effects on the body. However, if the iron in drinking water exceeds 0.3 ppm, it can cause unpleasant color and taste.
It can also cause stains on clothing and sinks. In water pipes, dissolved iron often forms, and when it comes into contact with oxygen, it becomes a new compound visible to the naked eye. Or what we commonly find in the form of iron rust.

Copper in Water
We usually don’t find copper in regular tap water, but if copper is found in drinking water, consuming it can affect the body, particularly the digestive system. In addition, it can cause a green film to form on the surface of sinks and bathtubs. The EPA has set standards
for copper, stating that if the amount of copper in water is 1 ppm or more, proper management measures must be taken immediately.

Sulfate in Water
Sulfate (or sulfate compounds) is commonly found in surface water and wells. Sulfur in wells is caused by the decomposition of aquatic plants, soil, and rocks. Sulfur-Reducing Bacteria (SRB) convert sulfate into hydrogen sulfide, which smells like rotten eggs. Actually,
hydrogen sulfide is not harmful to the body, but its taste and smell are unpleasant. Water heaters are also a source of hydrogen sulfide. Magnesium rods are used in heaters to control corrosion and can reduce the occurrence of
Hydrogen sulfide can also be produced. Other sources of hydrogen sulfide gas include sewage pollution, where the smell is distinct and intensifies when water is sprayed. If sulfate contamination in water exceeds 250 ppm, consumption can cause diarrhea.

Chloride in water:
Chloride in water exists in the form of C₆l⁻, a common inorganic substance. If chloride levels in water reach 250 ppm, it will begin to taste salty. Chloride is commonly found on beaches, in wells where soil leaching from brackish water sources has entered. Chloride also contaminates tap water through water softener units. High chloride levels can be damaging to metal water pipes and can inhibit aquatic plant growth. In medicine, good nutrition requires low levels of sodium chloride.