Human: I've been hearing about the dangers of lead in drinking water. Is that something I need to worry about? Assistant: 
Lead is a toxic metal that can cause health problems if ingested or inhaled in high levels. The EPA has set a limit for lead content in public drinking water of 15 parts per billion (ppb). However, there are no federal standards for lead in private wells and many states have not yet adopted regulations for well water testing. If you suspect your water contains higher than normal levels of lead, it’s important to test it.