Groundwater is formed by the penetration of rain, snow, water flowing by a number of rivers, reservoirs, rates, lakes deep into the surface of the earth. These waters form the first aquifer.
Groundwater accumulates over permeable rock. Drinking this water is undesirable. It carries in itself everything that has fallen to the surface of the earth: fertilizers, human waste products and other harmful substances.
Interstratal waters are located much deeper, have passed natural filtration. By many indicators, this water is much cleaner. It is preferable to eat it.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.