EN
Influence of using milking machines and milk coolers on natural environment pollution was investigated on 19 dairy farms (10-38 milking cows) in one village of Ciechanów province. Technical state, operation conditions and maintenance of the milking equipment were considered. Used oil (from the vacuum pumps), cleaning and disinfection chemicals and plastic packagings were the main factors of environment pollution. The necessity of periodical technical control of milking machines on the farms was recommended.