Kumanovska Banja (Macedonian Cyrillic: Кумановска Бања) or Kisela Voda (Macedonian Cyrillic: Кисела Вода) is a mineral spa in the Proevce 3 km from Kumanovo, North Macedonia. The first registered analysis of the water was in 1920 by Aleksej Scherbakov in the State Laboratory in Belgrade. Kingdom of Serbs, Croats and Slovenians. Analysis proved that the water is Alkaline earth water, with temperature of 28 degrees Celsius and 2.5 liters flow per second. He published the results with title Кисењаци код Жепче и Куманова in 1928. Next analysis took place in 1952 by Aleksandar Butkov the foundlings stated that the temperature is 30 degrees Celsius and 2.37 liters per second flow. Second water sours was discovered that same year by the road to the village of Zubovce with 0.181 liters per second