ABSTRACT: Problems connected with landfills as a parts of so called old environmental loads and their environmental impact are very current. Effort of the Slovak government is effectively incorporate old landfills into the environment. Various types of landfills with different conditions were selected for observation. For the purpose of this study it is possible to divide them into four types with their own system of monitoring. The localities Myjava-Holičov vrch, Myjava-Surovín and Uzovská Panica are landfills of a valley type. They represent the most common type of landfills in the Western Carpathians. Their main feature is that contamination gets out from the front of landfills, moves on the surface and then it is mixed up with surface water in a brook.