The paper presents changes of the San river water quality (from km 28+800 to 23+200) in result of treated municipal and industrial sewage discharge at km 26+440. Along the analyzed section, the San is under protection in the framework of Natura 2000 habitat areas programme (The Lower San River Valley). Analyses of pollutants in treated sewage originating from the Municipal and Central Treatment Plant were conducted twice a month. Municipal Sewage Treatment Plant, a maximum throughput of 17500 m3•24 hours-1, receives municipal sewage from Stalowa Wola city, was modernized in 2008 and is capable of receiving the pollutant load to 98500 RLM. The neighbouring Central Sewage Treatment Plant treats sewage from the Stalowa Wola Iron Works area and from the Tarnobrzeg EURO-PARK WISŁOSAN Special Economic Zone in Stalowa Wola. Its maximum throughput is 100000 m3•24 hours-1, but during the rainless weather the amount of sewage does not exceed 20000 m3•24 hours-1. The assessment of sewage effect on the San river water quality was carried out in two measurement-control points (2360 m above and 3240 m below the sewage discharge point) on the basis on four-year (2009-2012) analyses of 19 pollution indices, including 3 physical, 2 oxygen, 2 biogenic, 2 salinity, ...
The paper presents the results of hydrochemical tests of the Głębieniec stream, a 4th order, right-side tributary of the Kamienica river. The stream catchment , of mountain character and area of 9.58km2, is situated in the malopolskie voivodship, limanowski county and Kamienica commune. The 81% of the catchment is managed as forest grounds, the remaining area is an extensively used agricultural land. The analyses were conducted in 2011 in five measurement-control points over a stream stretch of 3405 m. The reaction (pH), electrolytic conductivity, concentrations of oxygen saturation and dissolved oxygen were measured in water samples on site, whereas the other quality indices: dissolved solids, NH4, NO3,NO2, PO4, total phosphorus, SO4, Cl, Ca, Mg, total iron, Mn, Na, and K were assessed in a laboratory of the University of Agriculture in Krakow. On the basis of the assessment results the ecological state of the Głębieniec stream water was rates as very good in all measurement-control points. Except for the measurement-control point No.1, the stream water may be used for potable water supply, but it must be first subjected to physical and chemical treatment due to high concentrations of total iron and manganese. Also, except for point No.1 (exceeded nitrite concentrations), ...
