To ensure that tap water is safe to drink, the EPA prescribes limits on the amount of certain contaminants in water provided by public water systems. FDA regulations establish limits for contaminants in bottled water. Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that the water poses a health risk. As water travels over the surface of the land or through the ground, it can dissolve many natural minerals and, especially in the case of ground water, radioactive material.
Water is also subject to contaminants resulting from the presence of animals or human activity.
Radioactive contaminants either natural or manmade. Manchester s water does not contain radon. Some people may be more vulnerable to contaminants in drinking water than the general population. These people should seek advice about drinking water from their health care provider. Each year, Manchester Water Works collects thousands of water samples to check for purity.