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. 2001 Sep;67(9):4242–4248. doi: 10.1128/AEM.67.9.4242-4248.2001

TABLE 1.

Description of sampling sites

Well or hot tap water Temp (°C) pH at 22°C Amt of Cl (mg/liter) Depth (m) Yr drilled Flow rate (liters/s) Filtration time (h) Sample vol (liters) Presence of microbes
RG-39a 91.4 9.5 20 2,100 1984 58.3 3.8 55.7 Yes
MG-18a 71.8 12 2,043 1973 46.6 3.3 106 Yes
RV-5a 129.2 9.2 6 741 1959 52.3 24 1,872 No
SN-4b 84.3 8.1 2,362 2,025 1972 >30 2.52 117.9 No
SN-5c 99.2 8.5 1,265 2,207 1981 >30 3.2 139.9 No
Hot tap waterd 76 9.4 0.5–186 634–2,857 1959–1984 >30 20 1,900 Yes
a

Data are from reference 17a. Temperature was measured during sample collection. 

b

In well SN-4 the sampled water was 84.3°C, but this well has previously yielded water of temperatures up to 117°C. The well has cooled down due to the drilling and subsequent production of a deeper well nearby (20). 

c

The temperature varies from 95 to 105°C. 

d

The hot tap water was a mixture of geothermal fluid transported from 50 operating geothermal wells into geothermal water tanks and then delivered into the laboratory through the one-way district heating system. The fluid from each well varied in chemical composition and temperature before it was mixed in the water tanks.