Summary:

The aim of the study was to evaluate the effect of precipitation, which were observed in Nowy Sącz, on the variability of quantitative wastewater inflowing into the treatment plant Wielopole in the years 2008-2014. An analysis of the data from the multi-year was presented as a time series. The next a method for spectral Fourier smoothing operation using a Hamming window was using. The 56 % relationship between the amount of precipitation and the daily flow of sewage was after decomposition. This means that variability of the flow to the treatment plant Wielopole can be explained by the amount of precipitation in 204 days for annual period.