Good-quality drinking water as well as the water we use for our body care is very important to our health. From well to faucet, the water comes in contact with numerous materials, chemicals, and technologies. This is where planners, tradespeople, building owners, or occupants can make a difference. Further, this course module also covers the environmentally aware and health-conscious use of laundry detergents and cleaning agents as well as the merits and pitfalls of water-saving technologies including rainwater or gray water use.