They have a fixed magnetic field, because they're made with permanent magnets, so you can't hold them close to a monitor. As for EMI (variable magnetic field), I really wouldn't know, but I can tell you that the casing is steel, so I wouldn't expect much of anything.
You could run a wire from the case of the pump to ground: I just checked and there's no electrical connection to either lead (while there's one between the leads). A cap would probably be better here, as per the above link on the RC motors.
|