Table 3. Concentrations of selected dissolved constituents in water collected from Cave Springs, a permanent pool in Lehman Caves, and two nearby springs at Great Basin National Park, Nevada.

[Site locations are shown in figure 2. Analyses were done by laboratories listed in table 2. Cave Springs prior to reconstruction of water-collection system: Analyses of Cave Springs water prior to reconstruction of water-collection system in 1996 (Gretchen Baker, National Park Service, Great Basin National Park, written commun., 2008). Nevada State Health Laboratory collected and analyzed sample. All values are in milligrams per liter except for specific conductance, pH, and temperature. Temperature is rounded to nearest 0.1 degree Celsius (ºC); pH is rounded to nearest 0.01 unit. Symbols: –, not determined; <, less than; E, estimated]

Dissolved constituent	Site 1 Cave Springs	Site 2 Pool in Lehman Caves	Site 3 Spring near upper Lehman Creek campground	Site 4 Marmot Spring	Cave Springs prior to reconstruction of water system
Sample date	09-07-07	09-06-07	09-07-07	09-06-07	07-22-87
Time of sample	12:30	10:30	17:00	15:45	–
Silica (SiO2)	14.9	45.0	7.85	13.7	16
Aluminum (Al)	E0.0013	<0.0016	0.0165	<0.0016	–
Boron (B)	0.020	0.144	0.0065	0.024	–
Iron (Fe)	0.311	<0.006	0.016	E0.003	0.030
Manganese (Mn)	0.209	E0.0002	0.0002	0.0012	0.000
Strontium (Sr)	0.144	1.03	0.054	0.060	–
Calcium (Ca)	31.6	48.0	4.20	11.9	13
Magnesium (Mg)	3.52	20.9	0.960	2.80	3.0
Sodium (Na)	6.58	25.4	1.59	7.20	7.0
Potassium (K)	1.04	3.49	0.43	0.75	1.0
Carbonate (CO3)	<1.0	<1.0	<1.0	<1.0	<1.0
Bicarbonate (HCO3)1	124	E250	17	E48	56
Sulfate (SO4)	2.88	20.0	1.38	4.11	3.0
Chloride (Cl)	5.33	14.5	0.62	4.97	5.0
Bromide (Br)	0.03	0.12	E.01	0.03	–
Fluoride (F)	0.13	0.39	<0.10	E0.08	0.11
Nitrate as NO32	0.279	2.83	2.10	1.62	2.7
Dissolved solids3	127	323	20	72	78
Dissolved inorganic carbon (DIC) as HCO3	108	E206	45.5	72	–
Alkalinity as CaCO3	102	E210	14	E40	46
Hardness as CaCO3	93	210	14	41	45
Specific conductance (microsiemens at 25ºC)1	192	442	36	110	132
pH (units)1	6.9	7.1	5.0	5.8	7.0
Temperature (degrees Celsius)1	12.6	11.4	5.6	10.6	–
Dissolved oxygen1	0.8	4.8	8.8	2.8	–

¹Field measurement.

² Nitrate concentrations reported as nitrate (NO₃) and were calculated for the four samples collected in September 2007 as the difference in nitrate-plus-nitrite and nitrite concentrations listed in table 4.

³ Residue upon evaporation at 180°C.