## 3 Results
### Hydrometeorological Conditions in the Catchment of the River Swierszcz
#### 3.2.1 Analysis of Selected Microbiological Indicators
There were no statistically significant differences in the distribution of _Pseudomonas aeruginosa_ counts between the tested waters (Kruskal-Wallis H = 2.636, \(p\) = 0.451) (Figure 8f). However, both rainwater and river water contained small amounts of these bacteria (Table 3). The groundwater samples (P4-P7) were the only ones in which the permissible limit of _Pseudomonas aeruginosa_ in drinking water was not exceeded [36]. Compliance with drinking water standards for rainwater was 50% and 60% for P1 and P2, respectively. \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline
**Point** & **Valid N** & **Mean** & **Median** & **Min.** & **Max.** & **Std. Dev.** & **Coef. Var.** & **Var. Group** & **Compliance * (\%)** \\ \hline \multicolumn{10}{c}{Total microbial count at 36 \({}^{\circ}\)C (cfu/mL)} \\ P1 & 10 & 816.7 & 150 & 0 & 4300 & 1369.2 & 167.6 & \begin{tabular}{c} Extremely \\ high \\ \end{tabular} & 40 \\ P2 & 10 & 962.4 & 900 & 62 & 2800 & 908.7 & 94.4 & High & 20 \\ P3 & 10 & 325 & 86 & 50 & 2200 & 667.2 & 205.3 & \begin{tabular}{c} Extremely \\ high \\ \end{tabular} & 60 \\ P4-P7 & 4 & 17.25 & 16 & 0 & 37 & 15.5 & 90.0 & High & 100 \\ \hline \multicolumn{10}{c}{Total microbial count at 22 \({}^{\circ}\)C (cfu/mL)} \\ P1 & 10 & 1500 & 1700 & 1700 & 2900 & 861.6 & 57.4 & High & - \\ P2 & 10 & 1490 & 1500 & 420 & 3500 & 919.0 & 61.7 & High & - \\ P3 & 10 & 1308 & 1350 & 150 & 2800 & 771.2 & 59.0 & High & - \\ P4-P7 & 4 & 67.5 & 77.5 & 30 & 85 & 26.0 & 38.5 & Moderate & - \\ \hline \multicolumn{10}{c}{Coliforms (cfu/100 mL)} \\ P1 & 10 & 12.2 & 0 & 0 & 72 & 26.2 & 215.1 & \begin{tabular}{c} Extremely \\ high \\ \end{tabular} & - \\ P2 & 10 & 45.7 & 60 & 0 & 72 & 31.8 & 69.7 & High & - \\ P3 & 10 & 58.4 & 57.5 & 21 & 90 & 19.1 & 32.8 & Moderate & - \\ P4-P7 & 4 & 0 & 0 & 0 & 0 & 0 & Low & - \\ \hline \multicolumn{10}{c}{_Escherichia coli_ (cfu/100 mL)} \\ P1 & 10 & 0.2 & 0 & 0 & 2 & 0.6 & 316.2 & \begin{tabular}{c} Extremely \\ high \\ \end{tabular} & 90 \\ P2 & 10 & 13.5 & 0 & 0 & 70 & 23.6 & 174.6 & \
\begin{tabular}{c} Extremely \\ high \\ \end{tabular} & 60 \\ P3 & 10 & 23.3 & 27 & 4 & 38 & 10.9 & 46.8 & High & 0 \\ P4-P7 & 4 & 0 & 0 & 0 & 0 & 0 & Low & 100 \\ \hline \multicolumn{10}{c}{_Instestinal enterococci (cfu/100 mL)} \\ P1 & 10 & 27.1 & 1.5 & 0 & 78 & 34.8 & 128.3 & Very high & 40 \\ P2 & 10 & 46.3 & 42.5 & 0 & 120 & 35.6 & 76.8 & High & 10 \\ P3 & 10 & 17.1 & 7.5 & 0 & 72 & 24.8 & 144.8 & Very high & 20 \\ P4-P7 & 4 & 0 & 0 & 0 & 0 & 0 & Low & 100 \\ \hline \multicolumn{10}{c}{_Pseudomonas aeruginosa_ (cfu/100 mL)} \\ P1 & 10 & 9 & 1.5 & 0 & 35 & 13.2 & 146.7 & Very high & 50 \\ P2 & 10 & 8.8 & 0 & 0 & 35 & 14.1 & 160.2 &
\begin{tabular}{c} Extremely \\ high \\ \end{tabular} & 60 \\ P3 & 10 & 9.4 & 0 & 0 & 32 & 12.8 & 136.2 & Very high & 60 \\ P4-P7 & 4 & 0 & 0 & 0 & 0 & 0 & Low & 100 \\ \hline \hline \end{tabular}  
* Compliance with the drinking water standard.  
\end{table} 
Table 3: Descriptive statistics of the microbiological parameters of rainwater versus flowing water and groundwater.