Alba, Arad, Argeş, Bacău, Bihor, Bistriţa-Năsăud, Botoşani Brăila, Braşov, Buzău, Călăraşi, Caraş-Severin, Cluj, Constanţa, Covasna, Dâmboviţa, Dolj, Galaţi, Giurgiu, Gorj, Harghita, Hunedoara, Ialomiţa, Iaşi, Ilfov, Maramureş, Mehedinţ, Mureş, Neamţ, Olt, Prahova, Sălaj, Satu Mare, Sibiu, Suceava, Teleorman, Timiş, Tulcea, Vaslui, Vâlcea, Vrancea
Băile Siriului spa is located in the district of Buzau, Băile Siriului is only used for a short period (between June 1 and October 1).
The center has three sources thermal mineral water with sulfur, light bicarbonate, chlorine, weakly mineralized.