The EU directive to ban growth hormones came in back in 1981. Importation of hormone-fed meat was, however, allowed until 1989. There are plenty of other 'growth promoters' such as ractopamine and broad-spectrum antibiotics (madness!) which have also been banned (even China has now banned antibiotic growth promoters, but there are all kinds of 'veterinary exemptions).
Generally, these practices are, of course, symbolic of poor, intensive conditions. Industrial cattle conditions in the US are, simply put, horrific. Chlorine washing meat won't hurt you, it's the reason they need to do so that might.
I'm minded that the best thing we can do for the environment is to eat less meat.