UPDATE: A shocking new study reveals serious safety concerns regarding drinking water quality on airlines, prompting urgent warnings for travelers. The report, released by the Center for Food as Medicine & Longevity on January 2, 2026, indicates that many airlines fail to meet federal safety standards, putting passengers at risk.
The comprehensive study evaluated water testing data from October 1, 2022, to September 30, 2025, across 10 major airlines and 11 regional carriers. Researchers assigned each airline a Water Safety Score ranging from 0.00 to 5.00. Notably, Delta Air Lines and Frontier Airlines received the highest ratings, while American Airlines ranked lowest among the major carriers with a score of just 1.75.
The study found alarming results from a total of 35,674 water sample locations tested for coliform bacteria, with 949 samples coming back positive. This indicates a significant risk, as coliform presence can signal disease-causing organisms in the water system. According to the report, nearly all regional airlines need to enhance their onboard water safety, with the exception of GoJet Airlines.
Speaking about the findings, the center’s director, Charles Platkin, stated,
“Delta Air Lines and Frontier Airlines win the top spots with the safest water in the sky, and Alaska Airlines finishes No. 3.”
He emphasized the need for improvement among regional airlines, highlighting that CommuteAir exhibited a troubling 33.33% coliform-positive rate.
Since the implementation of the federal Aircraft Drinking Water Rule in 2011, airlines have been required to provide safe drinking water onboard. However, civil penalties for violations remain extraordinarily rare, raising concerns about enforcement. The study criticized the U.S. Environmental Protection Agency, awarding it the “Shame on You” title for its lack of action in enforcing aircraft water safety standards.
Passengers should be particularly cautious about drinking water on flights, as the quality can vary drastically depending on the airline and location of water refill. The study serves as a critical reminder of the potential health risks associated with drinking or even washing hands with onboard water.
As travelers plan their upcoming journeys, it’s crucial to stay informed about which airlines prioritize water safety. With the results now public, passengers are encouraged to reconsider their beverage choices while flying.
The broader implications of this study could lead to increased scrutiny and demand for better water quality across the airline industry. As this situation develops, travelers should watch for any changes in airline policies or safety measures related to onboard water.
In conclusion, with these findings making headlines, it is essential for passengers to be aware of water quality issues on airlines and to prioritize their health while traveling. Share this information to keep fellow travelers informed about the risks of drinking water in the sky.
