How Safe Tap Water is Regulated
The safety of tap water is regulated by the Environmental Protection Agency (EPA), which sets national standards for drinking water quality. Under the Safe Drinking Water Act, the EPA sets limits on the levels of various contaminants in tap water, including bacteria, viruses, lead, and pesticides.
In addition to federal regulations, each state has its own laws and regulations that govern the safety of drinking water. The state agencies responsible for ensuring safe drinking water vary by state, but typically include a state department of health or environmental protection.