This may well be done at levels which are illegal since so many people in the USA today have no conscience anymore. Growth hormones will affect humans adversely if ingested for long periods of time. This should be no problem if handled lawfully, but the antibiotics often get into the milk where dairymen are greedy and cheat. An occasional use of this milk would not do any great harm. But continuous use of the contaminated milk by kids could do some real damage and add to the tolerance to antibiotics by microbes, which is now creating chaos in the medicating of US people.
Organic milk is one choice.
Another is to make a deal with a farmer in your area who is not playing tricks, and get the milk from the farm. Powered milk may have lower levels of contamination since the dairyman is not under as much incentive to cheat since the milk is not as vulnerable to loss if it is going to the powered milk processors. 1992-1993 tests by the FDA showed 6 pesticide varieties in peppers. To avoid Mexican contaminates, don't eat peppers in the winter which all come from Mexico. Also, cantelopes, celery, pears, and green beans are said to follow bell peppers, in that order, as contaminated.