Novel ultraviolet light emitting diodes (UV-C LED at 279 nm) are being investigated for broad-spectrum antimicrobial activity in addition to traditional mercury-lamp 254 nm UV-C systems. The goals of this study were to determine the doses required for hepatitis A virus (a resilient foodborne virus) inactivation in phosphate buffered saline (PBS, pH = 7.2), apple juice (AJ, pH = 4), and coconut water (CW, pH = 5), when treated with traditional 254 nm UV-C compared to 279 nm UV-C LED. For each tested liquid, 500 μL of HAV (∼5 log PFU/mL) was mixed with 4.5 mL liquid within glass beakers and treated for 0-15 min with 254 nm UV-C (maximum dose of 33.89 mJ/cm