Table 15. Quarterly water quality data from the Osage River near St. Thomas, Missouri, 1984 and 1995. (Data source USGS, 1985, and 1996).
CONSTITUENT FALL 1984 1995 WINTER 1984 1995 SPRING 1984 1995 SUMMER 1984 1995
Instanteneous discharge, (ft3/second) 20,400 12,300 6,730 21,600 35,100 52,700 2,020 31,600
Temperature, (Celcius) 12.0 15.5 1.5 3 16.5 19 25 27.5
Specific Conductance, (Fs/cm) 28 272 251 254 255 281 283 248
pH, whole water, field measurement 8 7.7 7.8 7.2 7.9 7.7 7.6 7.5
Oxygen, dissolved (mg/l) 8.2 9 12.8 12.6 9.2 9.7 6 3.9
Fecal coliform, (colonies/100 ml) 96 1 10 13 <4 1,100 39 5
Fecal streptococci, (colonies/100 ml) 220 475 52 115 80 1,260 22 205
Alkalinity, (mg/l as CaCO3) 106 102 106 83 91 105 123 90
Bicarbonate, dissolved (mg/l) - 125 - 99 - 126 - 109
Nitrate + Nitrite, total as N (mg/l) 0.33 0.12 0.56 0.47 0.8 0.24 0.45 0.17
Phosphorus, dissolved (mg/l) 0.01 0.03 0.02 0.03 <0.02 0.09 0.02 0.02
Calcium, dissolved (mg/l) 39 0.4 37 33 33 34 40 34
Magnesium, dissolved (mg/l) 11 9.8 11 7.9 7.7 10 8.8 6.9
Sodium, dissolved (mg/l) 5.5 4.3 5.2 5.7 7.9 4.5 5.4 8.2
Potassium, dissolved (mg/l) 2.9 2.8 3.2 3.4 2.4 2.3 2.6 3.2
Sulfate, dissolved (mg/l) 26 18 27 22 29 20 26 17
Chloride, dissolved (mg/l) 5.2 8.9 6.3 8.4 5.1 5.4 4.9 3.7
Flouride, dissolved (mg/l) 0.1 0.1 0.1 0.1 0.1 <0.1 0.2 0.1
Total solids, dissolved (mg/l) 159 155 170 216 159 158 153 142
Aluminum, dissolved (Fg/l) <10 <10 30 - 20 80 20 -
Iron, dissolved (Fg/l) 14 6 21 13 18 93 9 <3
Manganese, dissolved (Fg/l) 8 6 8 69 6 7 22 6
Nickel, dissolved (Fg/l) 11 <1 4 <1 <1 <1 10 1
Strontium, dissolved (Fg/l) 120 97 110 89 110 83 130 120

Return to Water Quality text