I am a farmer with giant water pumps and center pivots that run on 3 phase 480 volt power. One of my pumps has 85 horsepower. I wonder if I could wire up some sort of custom made tea kettle and get water to boil in five seconds?
3-phase electeode Boiler comes to mind.
Just have it as a pass-through with a grounded shield at the end to keep you from accidentally touching dangerous voltage.
It breaks down into its individual components which escape as gases. That alone shouldn't make the remaining water toxic, assuming a perfect reaction. But I guess the reaction isn't perfect due to things like impurities, the metals used as electrodes and so on?