The Environmental Protection Agency (EPA) is conducting a study on tap water to determine the presence of carcinogens. Some localities have been found to have clean drinking water that contains compounds that are potentially carcinogenic. Many of these compounds contain chlorine, which is added to water to purify it. Some scientists believe that chlorine may be combining with organic substances that are not removed during the filtration process, leading to the formation of dangerous substances. These findings have led to the passage of the Safe Drinking Water Act, which authorized the EPA to set minimum standards for levels of contaminants.
Chlorine is still used in water treatment to kill waterborne pathogens, but the EPA now limits levels of its by-products, such as trihalomethanes and haloacetic acids, which have been linked to an increased risk of cancer with long-term exposure. The EPA is also focusing on other contaminants in tap water, including lead and PFAS (forever chemicals), which have been associated with various health issues. Recent standards have been set by the EPA for PFAS and the agency has mandated that most lead pipe service lines be replaced within a decade to reduce exposure to these harmful substances.
Karen Kwon, the research and special projects editor at Science News, has a background in both chemistry and journalism. She earned a Ph.D. in chemistry from Columbia University and a master’s degree in journalism from New York University’s Science, Health, and Environmental Reporting Program. Her expertise allows her to bridge the gap between scientific research and journalism, ensuring accurate and informative reporting on topics such as the study of tap water carcinogens by the EPA.
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The EPA’s ongoing study on tap water carcinogens highlights the importance of monitoring and regulating contaminants in drinking water to protect public health. The findings of this study have led to the implementation of standards for levels of specific contaminants, such as trihalomethanes, haloacetic acids, lead, and PFAS, to reduce the risk of cancer and other health issues associated with long-term exposure. By addressing these concerns and implementing measures to mitigate the presence of harmful substances in tap water, the EPA is working towards ensuring safe and clean drinking water for all individuals. Supporting science journalism and staying informed on these critical issues is essential for promoting public health and environmental sustainability.
