Water can also help to lower your high blood pressure, because the blood is mostly water.
Excessive use of salt can have negative effects on your blood pressure, but sodium can be “washed” from the body if you drink clean purified water. So, drink an adequate amount of healthy water every day to maintain a healthy heart. When the body is dehydrated, the blood flow to the kidneys is reduced. The body will give the order the brain to “tighten” the veins and arteries, which will make blood pressure even higher.
Source: Večernje Novosti