Separate Storm Sewer Systems to have a stormwater permit. Water is essential to all life, and living things are mostly made of water. This is because water is a very good solvent, which means that many kinds of materials can dissolve or wash away in it. Sea water is salty because salts are dissolved in it. The beverages we drink are water with something dissolved in it. When we wash something, the water dissolves and carries away the dirt. Because water is good at dissolving things, it also helps to transport them in dissolved form from o
ne place to another.