A three-year study conducted by the Center for Food as Medicine and Longevity in New York City has revealed significant contamination issues in airline water systems. The study, which analyzed over 35,000 samples from 2022 to 2025, evaluated major and regional carriers based on contamination violations, E. coli findings, and maintenance practices.
The analysis found 32 E. coli violations across 21 airlines. Delta Air Lines received the highest safety scores, while Spirit Airlines, JetBlue, and American Airlines ranked lowest. The study used a scoring system from 0.00 to 5.00, with scores above 3.5 indicating relatively safe water.
According to the Center for Food as Medicine and Longevity, the study highlights the need for airlines to exceed minimum safety standards. Compliance with the Environmental Protection Agency’s Aircraft Drinking Water Rule (ADWR) is mandatory, but enforcement is often weak, with few penalties for violations.
Experts, including Charles Platkin, the study’s author, stress that passengers should not have to worry about water safety during flights. Passengers, especially vulnerable groups, should consider using bottled water and hand sanitizer instead of onboard water.
The study’s findings underscore the importance of rigorous monitoring and improved practices to ensure safe drinking water on flights. Airlines are encouraged to enhance their water safety measures, and passengers are advised to take precautions to minimize health risks.
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