In order to ensure that tap water is safe to drink, the Environmental Protection Agency has regulations that limit the amount of certain contaminants in water provided by water suppliers. The Food and Drug Administration establishes limits for contaminants in bottled water which must provide the same level of safety. 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 water poses a health risk. In addition to the contaminants that appear in our charts, we look for over 100 other contaminants that were not found at reportable levels.
Radon is waived, as it is associated with groundwater.
Radium is tested for only if other radiological elements exceed an action level. The following chemicals are unregulated, and the Environmental Protection Agency required monitoring for these to gather information about their occurrence. The following chemicals are unregulated, and the Environmental Protection Agency required monitoring for these to gather information about their occurrence. Aldrin, butachlor and dieldrin were waived from monitoring in Pennsylvania. The Philadelphia Water Department has a permit with the Pennsylvania Department of Environmental Protection for operating under optimize corrosion control.