Drinking too much water should not raise your blood pressure but if you drink at least 8 glasses of water per day you can actually lower your blood pressure by drinking just the right amount of water.
If you drink too much water your body won't be able to absorb the water and your kidney's will be overworked.
Drinking at least 8 glasses of water is good for your overall health and drinking water is a natural way to lower your blood pressure.