Objective To study the physical and chemical characteristics and medical effects of carbonate geothermal water in downtown Chongqing.Methods Thedataofphysicalandchemicalcharacteristics of carbonate geothermal water in downtown Chongqing was collected and analyzed by field testing

sampling and laboratory testing.Results The temperature of geothermal water of research area was 24.5

5

7.0 ℃ and most of it was alkalescence warm water;the main ions of the geothermal water were Ca

2+

and SO

4

2-

and the main hydrochemical types were Ca·Mg-SO

4

and Ca-SO

4

;the ranges of mass concentration of Sr

metasilicic acid

fluoride and metaboric acid were 2.0

1

9.3mg/L

26.81

5

3.55mg/L

0.76

4

.00mg/L

0.08

2

.63mg/L

the average values were 15.4mg/L

41.9mg/L

3.2mg/L and 1.3mg/L

except for some samples

the mass concentration of Sr

metasilicic acid

fluoride and metaboric acid met medical standards

showing medicinal value.Conclusion The downtown Chongqing has abundant and excellent geothermal water resources

and it creates favorable conditions for hot spring bath and recuperation.