depends on the water. 'pure' water is actually an insulator, so that wouldn't work

if it has ions dissolved, e.g. SALT (not sugar!) or SOAP (don't drop the radio in the tub!) then it becomes a conductor and then, depending on what is IN the water, might kill it

but then you're left with ionised (salty, soapy, other) water full of muck

just boil it dude.