Open-File Report 2006–1058

U.S. GEOLOGICAL SURVEY
Open-File Report 2006–1058

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Table 18. Specific conductance and concentrations of selected chemical constituents in water from selected springs that discharge from the N aquifer, Black Mesa area, Arizona, 1948–2005.

[μS/cm, microsiemens per centimeter at 25°C; mg/L, milligrams per liter; °C, degrees Celsius. Dashes indicate no data]

Year Specific
conductance,
field (μS/cm) 		Dissolved solids,
residue at
180°C (mg/L) 		Chloride,
dissolved
(mg/L as Cl) 		Sulfate,
dissolved
(mg/L as SO4)
Burro Spring
1989 485 308 22 59
1990 1545 347 23 65
1993 595 368 30 85
1994 1597 368 26 80
1996 525 324 23 62
1997 1511 332 26 75
1998 504 346 25 70
1999 545 346 25 69
2001 480 348 24 68
2002 591 374 31 77
2003 612 374 30 81
2004 558 337 25 64
2005 558 357 25 69
Unnamed spring near Dennehotso
1984 195 112 2.8 7.1
1987 178 2109 3.4 7.5
1992 178 108 3.6 7.3
1993 184 100 3.2 8.0
1995 184 124 2.6 5.7
1996 189 112 2.8 8.2
1997 1170 98 2.4 6.1
1998 179 116 2.4 5.4
1999 184 110 2.8 6.3
2001 176 116 2.6 6.0
2002 183 104 2.7 7.4
2003 180 118 2.9 7.2
2004 170 117 2.7 5.0
2005 194 114 2.6 8.7
Moenkopi School Spring
1952 222 --- 6 ---
1987 270 161 12 19
1988 270 155 12 19
1991 297 157 14 20
1993 313 204 17 27
1994 305 182 17 23
1995 314 206 18 22
1996 332 196 19 26
1997 1305 185 18 24
1998 296 188 18 24
1999 305 192 19 26
2001 313 194 18 26
2002 316 191 18 23
2003 344 197 19 23
2004 349 196 19 21
2005 349 212 23 30
Pasture Canyon Spring
1948 1227 (2) 5 13
1982 240 --- 5.1 18
1986 257 --- 5.4 19
1988 232 146 5.3 18
1992 235 168 7.1 17
1993 242 134 5.3 17
1995 235 152 4.8 14
1996 238 130 4.7 15
1997 232 143 5.3 17
1998 232 147 5.1 16
1999 235 142 5.1 14
2001 236 140 5.1 17
2002 243 143 5.1 16
2003 236 151 5.1 16
2004 248 150 5.5 16
2005 250 149 5.1 16

1Value is different in Black Mesa monitoring reports before 2000. Earlier reports showed values determined by laboratory analysis.

2Value is different in Black Mesa monitoring reports before 2000. Earlier reports showed values determined by the sum of constituents.

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