The non-woven geotextile is a commonly used material as a component fulfilling drainage systems especially on sites such as municipal waste landfills. The main advantage of geofilters is they help minimizing a clogging effect of drainage. The parameter that determinates the application usability of this product is water permeability. The paper present the research methodology and results analyses obtained from laboratory measurements for pure and exploited non-woven geotextiles under loads. The aim of the research was to determinate water permeability under differ exploitation and loading conditions. The measurements were conducted according to national standards. The results obtained allowed assessment of water permeability changes of tested material in time and under loads, and also allowed verification of the effectiveness of applied geofilters which were collected from the old municipal solid waste landfill.

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