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<br /> Table XIII <br /> HISTORY OF WATER QUALITY - lAS ANIMAS <br />0 <br />r-- <br />CD <br />...... DATE OF SAMPLE <br /> 11/56 10/58 9/60 10/60 4/61 5/63 3/67 9/68 12/69 6/70 <br /> CHARACTERISTICS <br /> Total dissolved sol ids 2850 2984 2853 3590 3854 3075 <br /> Total hardness 1511 1327 1615 1161 1439 1403 1228 1764 1762 1310 <br /> Fluoride 1.3 0.8 1.8 1.4 1.7 1.4 1.4 1.2 1.6 1.5 <br /> Selenium 0.006 0.039 0.010 0.023 <br /> '" <br /> ... Chloride 101 101 127 100 136 115 100 140 183 118 <br /> Copper 0 0 0 0.1 0 0 0 0 0 <br /> Iron 0 0 0.53 0.08 0.05 0.35 0.15 3.0 0 <br /> Manganese 0 0 0 0 0 0.15 0 0 0 <br /> Nitrate 6.4 6 4 12 2 0 <br /> Sulfate 371 1740 1550 1520 1190 1643 1445 1842 2093 1643 <br /> Calcium Carbonate 1140 832 779 765 907 904 486 1200 1020 828 <br /> Magnesium 90 120 203 96 129 121 180 137 180 117 <br /> Sodium 360 400 488 400 415 380 300 470 480 185 <br /> pH 7.5 7.2 7.0 7.3 <br /> Temperature 61 <br />