The president’s panel recommended water filters for homes to reduce the risk of cancer-causing chemicals. The Panel concluded that "individuals and families have many opportunities to reduce or eliminate chemical exposures. For example, filtering home tap water or well water can decrease exposure to numerous known or suspected carcinogens or endocrine-disrupting chemicals."
Beside scaly and itchy skin, some drinking water contain the cancer-causing disinfection byproducts. Excessive chlorine residual in the finished water could result of in the formation of DBPs such as Trihalomethanes (THMs or TTHMs), Bromoform, Bromodichloromethane, Dibromochloromethane. EPA listed cancer, liver, kidney and reproductive and developmental problems in humans as some health problems that may result from DBPs.
Free chlorine in shower water can leave your hair dry and brittle and make your skin flaky and itchy. Chlorine smell can also trigger negative reactions in children, the elderly, and people with chlorine-sensitivity. Using a shower head filter offers a great benefits in reducing the amount of chlorine in your shower water.
House plumbing may leach chemicals and contaminate water inside pipes. Water from the treatment plant make be good to drink until pipes inside your house leach dangerous chemicals to it.
Hard water may not be unhealthy to drink but it’s bad for your plumbing systems, bath tub, and appliances.
In the distribution pipes could contaminate water as it travels from the treatment plant to homes and other points of use.