Pure water boils at 100 degrees Celsius. But this conclusion was reached with water that did not dissolve the substance, that is, distilled water.
Tap water on the other hand has many minerals dissolved in it and some solutes that (due to one of the colligative properties of solutions) raise the boiling point. The interaction between charged ions and water means that a little more energy is required to escape from the surface of the water, therefore occurs at a higher temperature.
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.