The strongest sulphur-rich brine in the world used for treatment at the Physiotherapy Center comes from the “Malina” borehole in Solc Zdrój. According to its classification, it is a strongly mineralised sulphur chlorite-sodium (brine) water, sulphur brine, bromide, iodide and boron—featuring the highest content of active
The strength of balneological treatments depends on the concentration of active sulphur compounds in the water. Using medicinal water sources containing high concentrations (over 100 mg/1L) of sulphur compounds provides the best therapeutic effects in a spa treatment course.
Overview of selected
sulphur waters in Poland
| Source location | % mineralisation | sulphur compounds in water |
| Swoszowice | 2,64% | 70,04 mg H2S/1L |
| Krzeszowice | 0,28% | 6,00 mg H2S/1L |
| Horyniec | 0,75% | 23,00 mg H2S/1L |
| Busko-Zdrój | 1,40% | 50,00 mg H2S/1L |
| Solec-Zdrój “Malina” | 3,10% | 830 mg H2S/1L |
