[Tetrachloroethylene pollution in the neighborhood of chemical cleaning establishments].

In the neighbourhood of drycleaners the concentration of tetrachloroethylene in the blood of inhabitants and in the indoor air was measured. In the indoor air we found up to 20 ppm of tetrachloroethylene. The maximal concentration in the whole blood was 2.500 micrograms/l. In people without known exposure tetrachloroethylene was found in the blood too. Neighbours of drycleaners are highly exposed to tetrachloroethylene and further studies are necessary to check on the health risks due to immission of the chemical.