The town has the biggest resource of mineral water in the country and on the Balkan Peninsula with total capacity of 143 l/sec. There are over 80 springs in Velingrad, issuing from 3 mineral water deposits with different physics and chemistry characteristics, which deposits take the names of the districts they are located in.
The mineral water from the Chepino spring /the biggest mineral spring in the town/, from where the balneocomplexes Saint Spas and SPA Club Bor are supplied through with their own water-main, is hypothermal with temperature 48оС and general mineralization 187 g/l. It has the following characteristics: hydro carbonate, sodium, fluoric, silicon, radon, with hydrosulfide. The capacity of the spring is 70 l/sec.
The water is appropriate for drinking, inhalation and bathing, and the indications for prophylaxis, healing and recreation are for the following diseases: musculoskeletal system, peripheral nervous system, respiratory system, metabolism, gastrointestinal tract, nephritis and urological diseases, gynecological diseases, skin diseases, functional disorders of the nervous system.
| Content of the mineral water | Chepino spring |
| Water temperature (C°) | 48 |
| pH | 9,15 |
| Radio-activity in emana per liter | 68 |
| Cations in mg/l | |
| Potassium | 0,49 |
| Sodium | 47,60 |
| Calcium | 4,62 |
| Magnesium | Few |
| Anions in mg/l | |
| Fluorine | 4,50 |
| Chlorine | 3,66 |
| Sulphates | 44,03 |
| Hydro-carbonates | 51,65 |
| Carbonates | 19,05 |
| Hydro-phosphate | 0,01 |
| Met silicon acid | 45,76 |
| General mineralization | 187g/l |


