The article discusses the potential health effects of exposure to lead, a toxic metal that can be found in soil, water, and other environmental sources. Exposure to lead can cause a range of health effects, including developmental delays, cognitive impairment, and cardiovascular disease.

The authors review the current state of knowledge on the sources of lead exposure, including drinking water, food, and occupational exposure. The authors note that drinking water is a major source of lead exposure for some populations, particularly those who rely on private wells or live in older homes with lead pipes or plumbing fixtures.

The article highlights the importance of monitoring and regulating lead levels in drinking water to protect public health. The authors note that the current maximum contaminant level (MCL) for lead in drinking water in the United States is 15 parts per billion (ppb), but some studies suggest that even lower levels of lead exposure may be associated with increased health risks. The authors call for continued research to better understand the health effects of lead exposure and to develop more effective strategies for reducing exposure.