A major threat to drinking water pollution is also pesticides, such as pesticides and fertilizers. This often contains heavy metals such as arsenic, which are not excreted by the body and can thus accumulate in the organism in the long term. This form of pollution takes place over contaminated soil and water. By way of detours, the pollutants enter the groundwater, which is used for drinking water treatment. The chemical substances are difficult to remove.
• Old pipelines
Old pipelines are also a risk for drinking water contamination, as in this way germs and bacteria can settle in the water. This can lead to diarrhea, vomiting and convulsions. In addition, it is possible that various heavy metals are released, which promote serious health problems. An example is lead: Lead contamination can affect the development of children. From new copper pipes copper can reach the water in questionable amount. Copper can lead to gastrointestinal problems. Chlorine promotes arterial hardening, respiratory problems, asthma and allergies to some degree. This is only part of the possible sequelae or diseases caused by drinking water contamination. Heavy metals are among the most dangerous substances: they can accumulate in the body and are often not eliminated, so they pose a major threat to health.