In an embodiment, a fuel decontamination unit comprises a decontamination region containing fuel and an ultraviolet light located in the decontamination region wherein the ultraviolet light is configured to irradiate the fuel. In an embodiment, a method of decontaminating fuel comprises flowing a contaminated fuel into a decontamination unit irradiating the fuel with ultraviolet radiation that is emitted from the ultraviolet light such that the contaminated fuel becomes a purified fuel flowing the purified fuel out of the decontamination unit wherein a microorganism level in the purified fuel is less than that of the contaminated fuel.