Electrically treated water (ETW) has a character of nanotechnology. It is produced by special equipment for dissociation of water molecules. The practice of adding ETW to the wet diet of growing pigs was subjected to an experiment. A control group of pigs that did not receive any ETW was matched by two experimental groups, one getting 4% of ETW in the total feed (Exp-4%), and the other 8% (Exp-8%). The dosage was maintained throughout the entire fattening period up to the slaughter. Meat quality was assessed by technological and sensory evaluation. The tests did not reveal any negative effect of ETW addition on meat quality in either experimental group.