You can get metal poisoing
In mid and log term you can get sick by constantly consume of metals like: arsenic, lead, iron, cadmium, mercury, copper and zinc which are in our water in small quantities.
Over 126,000 plants throughout the country that tested positive for groundwater pollution. Some of the worst offenders that are seeping into our supply include arsenic and lead, which can create a host of negative health effects.
Chromium is an odorless and tasteless metal so it can be hard to detect yourself. "Yellow water signifies the potential presence of chromium-6." This substance can lead to many strong diseases but the main one is cancer.
Children behavior change
Years ago it was believed that small amounts of lead in water were not harmful. But currently it's a fact that if you are constantly exposed to it, it can be the source to health effects, mostly on kids giving them symptoms like behavioral changes, learning problems, lower IQ, and even slower growth.
Even the smallest exposure to asbestos is dangerous. If you're worried about your pipes, you can have your home re piped also they suggest that you install a filtration system with a filter that is one micron or less. This will filter out asbestos fibers from your home's tap water.
Fluoride has been added to public water supplies for decades in order to prevent tooth decay. However, recent research strongly suggests that water contaminated with fluoride is linked to neurological, immune, and gastrointestinal damage.