Water is the source of life. Its means in water there is content that is capable of supporting life, especially for humans. Type of water is very diverse, so not all of the water can be used to make ends meet.
In this case water as the source of life is the water that can be consumed safely. That means the water that is clean and hygienic.
So what is got to do with asthma? If you are an asthma sufferer, then when you see a doctor often the doctor will advise you to take medication regularly and consume lots of water.
