Summary:

The paper presents the analysis of research results on the unit pollution loads in the effluent from two public utility buildings - schools. Both school build-ings are located in the typical rural communes in Lesser Poland Voivodeship. During the research period the first school in Rajbrot was attended by 365 students whereas the number of students in the second school in Imbramowice reached 100.
The objective of this study was to determine the unit load for the following pollution indexes: BOD5, COD, total suspended solids, total nitrogen and total phosphorus. The research period was 36 months in 2006-2008. During this period 36 samples of the sewage runoff (raw sewage) from each object were collected on average once a month. Based on the collected data the following characteristic values of unit pollution loads were defined: minimum, maximum and arithmetic mean.
The research results were compared to information presented in the litera-ture on the unit pollution loads in household sewage. Updated data on pollution loads in sewage from the school buildings should contribute to the correct design or selection of individual sewage treatment systems based on the population equivalent (PE) for objects of this type wherever there are no data on physico-chemical analyses of sewage.