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<br /> .TABLE V <br /> .Chemical Quality of Surface Waters in Study Area <br /> Sampling Station EC Cl S04 <br /> (Number of Samples) (micromhos per TDS Ca Mg Na HC03 <br /> Date Samples Collected centimeter) pH (mi11i~rams per liter) <br /> Red Mountain Creek 990 4.1 805 161 11 7 0 1 445 <br /> near Ironton,Colorado (3) 676 3.9 547 105 7 5 0 0 334 <br /> 9/58-2/59 789 4.1 653 126 9 6 0 1 389 <br /> Dallas Creek near 1173 8.5 945 190 50 38 25{. 6 572 <br /> Ridgway, Colorado (47) 416 7.5 294 64 12 10 101 0 96 <br /> 9/58-2/63 . 641 8.2 488 95 20 15 153 2 224 <br /> Uncompahgre River 1005 8.4 796 148 28 50 204 11 472 <br /> near Ridgway,Colorado (47) 301 7.9 184 43 5 8 57 1 86 <br />.... 9/58-'),/63 530 8.1 352 77 12 20 103 3 177 <br />0 <br /> Cow Creek near 339 8.7 250 42 10 19 121 2 67 <br /> Ridgway, Colorado (20) 83 8.0 52 10 1 4 35 0 7 <br /> 4/59-1/61 116 8.1 71 14 2 6 50 1 15 <br /> Uncompahgre River 917 8.3 698 131 29 49 207 9 390 <br /> at Colona, Colorado (23) 327 7.5 202 37 7 10 76 1 81 <br /> 2/6l~2/63 546 8.1 377 74 15 21 115 3 183 <br /> Uncompahgre River _ 2778 8.6 2526 303 129 324 304 34 1520 <br /> at Delta, Colorado (34) 988 7.6 754 102 32 65 114 8 386 <br /> 4/59-4/62 1859 8.1 1567 189 68 162 188 17 886 <br /> Source: U. S. Bureau of Reclamation, Region 4. Upper, middle, and lower values for each station are the <br /> maximum, minimum, and-weighted mean value, respectively. <br />