What color is purified water supposed to be?

Pure water is typically colorless, odorless, and tasteless. Minerals, sediment, and rust are generally the cause of brown water. Being a holiday home, the water is likely left to sit for a while, and when you turn on the tap, it stirs up these deposits. If the reason for the brown water is simply minerals or sediment, leave the tap to run for a while, and it will likely turn clear.