In general, drinking water can help reduce the risk of bladder cancer as water can help dilute the concentration of cancer-causing agents through urine.
It is advised you drink pure water for preventing cancer. If it is not available, you can use a whole-house filtration system to eliminate all the harmful byproducts like ammonia, chloramines, chlorine and something like that from your source of water.
Alternatively, you can use the following tricks to get the purer water. For example, add some slices of peeled orange to water pitcher for about 30 minutes to neutralize the chloramines in the water; or use about 1000 mg vitamin C tablet to dissolve in your bath water.
Vitamin C will help to neutralize the chloramines in the water very well. The adequate amount of water for your body is at least 8 cups of water per day.
