While water itself is just those two elements, it's important to note that water naturally contains dissolved minerals and impurities. The specific composition of these impurities varies depending on the source of the water.
Here are some examples of common impurities found in water:
* Minerals: Calcium, magnesium, sodium, potassium, iron, chloride, sulfate
* Gases: Oxygen, nitrogen, carbon dioxide
* Other substances: Organic matter, bacteria, viruses, pesticides, herbicides
