Pseudomonascells able to degrade biphenyl and chlorinated benzoates were used as a basis of the recognition element in amperometric biosensors. The possibility of detecting biphenyl and chlorinated benzoates in a range of concentrations from 0.002 to 0.3 mM and 0.01 to 1.0 mM, respectively, was shown. The sensors were characterized by wide substrate specificity. Their parameters and the dependence of signals on the measurement conditions (pH of the medium, temperature, salt concentration) were studied. It was suggested that these analyzers can be used in practice for evaluation of the total pool of aromatic xenobiotics available at high concentrations in chemical industry wastes.