## 3 Results
### Chemical Composition and Microbiological Quality of Water in the Remiaszow Stream  
The water in the Remiaszow stream has alkaline pH and the mean mineralization is c.a. 280 mg/L (Table 3). The chemical composition is dominated by HCO\({}_{3}\)\({}^{-}\) among anions and by Ca\({}^{2+}\) among cations. Mg\({}^{2+}\) and SO\({}_{4}\)\({}^{2-}\) have slightly lower values. The concentration of remaining ions generally does not exceed 10 mg/L. Mesophilic and psychrophilic bacteria were always found in these samples of water. The number of coliforms and fecal coliforms \begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline
**Feature** & **Unit** & **Mean** & **Median** & **Min** & **Max** & **Q25 *** & **Q75 *** & **CV * [\%]** \\ \hline pH & – & 6.34 & 6.42 & 5.56 & 6.85 & 6.09 & 6.67 & 7.3 \\ EC & \(\mu\)S/cm & 31.27 & 32.35 & 17.90 & 46.90 & 20.60 & 37.50 & 34.9 \\ TDS & mg/L & 21.37 & 23.20 & 12.01 & 31.63 & 12.61 & 25.56 & 36.1 \\ Ca\({}^{2+}\) & & 3.478 & 4.052 & 1.028 & 5.475 & 1.560 & 4.703 & 51.4 \\ Mg\({}^{2+}\) & & 0.463 & 0.490 & 0.116 & 0.648 & 0.418 & 0.618 & 42.0 \\ Na\({}^{+}\) & & 0.435 & 0.429 & 0.249 & 0.572 & 0.405 & 0.525 & 25.7 \\ K\({}^{+}\) & & 0.689 & 0.466 & 0.233 & 1.724 & 0.369 & 0.879 & 80.1 \\ NH\({}_{4}\)\({}^{+}\) & & 0.634 & 0.442 & 0.266 & 1.756 & 0.385 & 0.514 & 87.6 \\ HCO\({}_{3}\)\({}^{-}\) & & 8.431 & 8.125 & 2.438 & 12.780 & 7.038 & 12.082 & 44.7 \\ SO\({}_{4}\)\({}^{2-}\) & & 3.848 & 4.107 & 1.947 & 5.636 & 2.413 & 4.879 & 36.9 \\ Cl\({}^{-}\) & & 1.000 & 0.969 & 0.323 & 1.704 & 0.876 & 1.156 & 44.9 \\ NO\({}_{3}\)\({}^{-}\) & & 2.306 & 1.992 & 1.189 & 4.288 & 1.576 & 2.802 & 48.2 \\ NO\({}_{2}\)\({}^{-}\) & & 0.078 & 0.085 & 0.033 & 0.127 & 0.034 & 0.104 & 49.4 \\ \hline \end{tabular}  
* Q25—lower quartile, 25% of data are below this value; Q75—upper quartile, 25% of data are above this value. CV—coefficient of variation.  
\end{table} 
Table 1: Physico-chemical characteristics of precipitation water and basic statistics. \begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline
**Feature** & **Unit** & **Mean** & **Median** & **Min** & **Max** & **Q25 *** & **Q75 *** & **CV * [\%]** \\ \hline pH & – & 7.66 & 7.74 & 7.03 & 8.15 & 7.42 & 7.94 & 4.6 \\ EC & \(\mu\)S/cm & 250.4 & 256.5 & 133.7 & 299.6 & 251.3 & 269.6 & 16.2 \\ TDS & mg/L & 197.2 & 202.4 & 100.9 & 230.1 & 197.1 & 208.6 & 16.6 \\ Ca\({}^{2+}\) & & 36.1 & 36.8 & 19.5 & 42.8 & 35.6 & 38.7 & 16.1 \\ Mg\({}^{2+}\) & & 7.5 & 7.7 & 4.0 & 8.9 & 7.4 & 8.1 & 16.4 \\ Na\({}^{+}\) & & 3.87 & 3.85 & 1.39 & 5.27 & 3.45 & 4.63 & 28.0 \\ K\({}^{+}\) & & 0.832 & 0.835 & 0.629 & 1.057 & 0.761 & 0.909 & 13.9 \\ HCO\({}_{3}\)\({}^{-}\) & & 117.5 & 122.6 & 59.9 & 141.3 & 115.0 & 124.8 & 16.9 \\ SO\({}_{4}\)\({}^{2-}\) & & 22.4 & 23.4 & 10.4 & 26.8 & 21.4 & 25.1 & 19.6 \\ Cl\({}^{-}\) & & 5.2 & 5.3 & 1.7 & 7.7 & 4.3 & 6.6 & 33.7 \\ NO\({}_{3}\)\({}^{-}\) & & 3.5 & 3.5 & 2.7 & 4.8 & 3.1 & 3.7 & 16.8 \\ Total coliforms & CFU/100 mL & 14,980 & 4390 & 49 & 112,000 & 106 & 13,000 & 209.6 \\ Total _E. coli_ & & 6570 & 925 & 5 & 44,600 & 80 & 5100 & 202.6 \\ Fecal coliforms & & 3350 & 220 & 30 & 21,000 & 105 & 2195 & 201.7 \\ Fecal _E. coli_ & & 2600 & 130 & 21 & 19,500 & 51 & 1770 & 221.0 \\ Mesophilic bacteria. & CFU/mL & 3270 & 720 & 12 & 14,510 & 263 & 4198 & 153.4 \\ Psychrophilic bacteria. & & 3450 & 1950 & 30 & 9000 & 740 & 6050 & 93.1 \\ \hline \end{tabular}  
* Q25—lower quartile, 25% of data are below this value; Q75—upper quartile, 25% of data are above this value. CV—coefficient of variation.  
\end{table} 
Table 2: Physico-chemical characteristics, bacteriological indicators of water quality and basic statistics—river Bialka, water intake for artificial snow production. in the water of this stream is highly variable, as evidenced by high coefficients of variation (CV > 200%). However, it can be observed that the number of bacteria in the Remiaszow stream is definitely lower than in water drawn from the Bialka river, used for the production of artificial snow.