Parameter Wastewater (inflow) July/October Cleaning  water (outflow) July/October Effect CW (%) July/October
Suspended solids (mg/l) 35/29 10/10 71.43/65.52
COD (mg/l) 200/190 30/30 85.0/84.2
BOD5 (mg/l) 70/50 3/3 95.8/94.0
Table 4: Some physical-chemical measurements of inflow waste water and outflow cleaning water CW in Sveti Tomaž. Wastewater inflow and cleaning outflow water samples taken common twice, once in July and once in October.