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Water-Quality Assessment of the Sacramento River
Basin, California: Water-Quality, Sediment and Tissue
Chemistry, and Biological Data, 1995-1998
(Open-File Report 2000-391)

Sacramento River at Colusa, California

Major Inorganic Constituents in filtered water (0.45 micrometer capsule filter)

Number of significant figures do not reflect analytical method reporting levels.

Method reporting levels of all analytes

[mg/L - milligrams per liter, µg/L - micrograms per liter, < - less than]

Date Time Calcium (mg/L) Magnesium (mg/L) Sodium (mg/L) Potassium (mg/L) Chloride (mg/L) Sulfate (mg/L) Fluoride (mg/L) Silica as SiO2 (mg/L) Iron (μg/L) Total solids (mg/L)
2/28/96 1210 11 5.1 6.4 1.2 2.8 4.6 <.10 21 16 97
3/20/96 1100 13 6.5 6.4 1.2 3 6.8 <.10 21 8 104
4/2/96 1220 14 6.9 7 1 4 8.4 <.10 21 20 99
5/16/96 1300 11 5.3 6.2 1.1 2.9 4.9 <.10 20 12 94
6/17/96 1100 11 5 6 1.1 2.5 4 <.10 20 46 82
7/16/96 1300 10 5.1 5.6 1.1 2.2 3.3 <.10 20 12 79
8/14/96 1030 9.5 5 5.5 1.1 2 3.4 <.10 19 11 72
9/25/96 1300 9.9 5.3 5.8 1.1 2.5 4 <.10 19 10 100
10/9/96 1130 11 6.5 5.9 1 3.1 4.3 <.10 19 14 94
11/14/96 1120 12 6 8.1 1.4 4.2 5.3 <.10 21 14 93
12/4/96 1030 13 6.8 8.7 1.5 4.6 6.5 <.10 24 14 107
12/16/96 1330         3.4 4.8 <.10     92
1/4/97 1300 9.7 3.9 4 1.1 1.9 4.2 <.10 15 18 68
2/12/97 1200 13 5.7 6.1 1.1 3 6.3 <.10 20 10 96
3/13/97 1100 14 7 7.4 1.2 4.2 8.3 <.10 21 5 104
4/16/97 1240 14 7 7.6 1.3 4 7 <.10 21 9 100
5/20/97 1130 11 5.5 6.2 1.1 3 5.2 <.10 20 3.6 101
6/3/97 1250 10 5.5 5.7 1.1 2.8 4.6 <.10 19 7.9 87
7/31/97 1110 10 4.9 5.8 1.1 1.9 3.3 <.10 20 6.4 87
8/18/97 1120 12 5.7 7 1.2 2.4 4.1 <.10 21 4 95
9/25/97 1130 12 5.7 7.6 1.4 3.2 4.8 <.10 22 6.8 102
10/21/97 1100 13 6.5 8.1 1.3 4.7 4.9 <.10 21 16 104
11/13/97 1100 12 6.3 8.4 1.4 4.5 5.4 <.10 21 10 114
12/9/97 1100 9.9 5 6.3 1.3 4 5.8 <.10 20 24 91
1/13/98 1150 9.1 4.3 4.7 1.1 3.5 4 <.10 19 32 81
2/11/98 1300 12 5.4 5.6 1.1 2.3 6.1 <.10 19 < 10 87
3/17/98 1230 15 7.1 6.3 1 3.3 8.4 <.10 21 < 10 109
4/8/98 1130 12 5.4 5.3 0.95 2.3 6.1 <.10 19 13 86

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