Recent research suggests that bottled water may not be the healthier option many believe it to be. A study published in 2024 in the journal NIEHS found that a single liter of some bottled water brands can contain tens of thousands of microplastic particles, raising concerns about potential health effects. This finding is prompting a reevaluation of whether tap water is a better choice for consumers.
Despite the popularity of bottled water, particularly during emergencies or in areas with unsafe tap water, studies indicate it isn’t necessarily safer or purer than readily available municipal water sources, especially in developed countries. According to reports, most developed nations have safe tap water supplies.
In the United States, the average person consumes approximately 30 gallons (114 liters) of bottled water annually. However, growing environmental and health concerns are leading many to question whether tap water is a preferable alternative. Researchers explain that tap water, also known as municipal water, typically comes from large wells, lakes, rivers, or reservoirs.
Before reaching homes and commercial facilities, tap water often undergoes treatment at a water treatment plant. While water contamination can be an issue in some regions, tap water is generally considered safe, convenient, and environmentally friendly. The United States boasts what the Centers for Disease Control and Prevention (CDC) considers the safest drinking water supply in the world.
U.S. Public tap water is regulated by the Environmental Protection Agency (EPA) under the Safe Drinking Water Act (SDWA). The EPA sets legal limits for potential contaminants in drinking water. A recent study conducted in 2025 revealed that several bottled water samples contained levels of bacterial contamination exceeding permissible limits. The Conversation reports that bottled water is classified as a packaged food product, which means it is subject to less frequent inspection and manufacturers aren’t required to disclose details about its ingredients or quality test results.
These findings highlight the importance of considering the source and quality of drinking water, and suggest that tap water may be a safer and more sustainable option for many consumers. The study’s results could influence future regulations and quality control measures for the bottled water industry.
