Systems and methods are disclosed for cleaning and sterilizing fluids and other materials. In one implementation, one or more emitters are submerged within a fluid and emit electromagnetic waves having a variable frequency. The frequency of the electromagnetic waves is swept across a frequency range to neutralize bacteria, viruses, and other pathogens in the fluid. The emitters may be submerged within a fluid reservoir and/or within the interior of an enclosed fluidic path (e.g., a pipe). Solid materials may be sterilized by immersing the solid materials within the fluid of such a fluid reservoir. In another implementation, electromagnetic waves may be applied to one or more wires that are wrapped around an exterior wall of a pipe. The frequency of the electromagnetic waves may be varied across a frequency range, resulting in scale and other materials being cleaned from the interior wall of the pipe.
