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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)

Colusa Basin Drain at Road 99E near Knights Landing, 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) Sulfat (mg/L) Fluoride (mg/L) Silica as SiO2 (mg/L) Iron (µg/L) Total solids (mg/L)
2/7/96 1030 17 9.7 27 3 13 27 0.2 11 22 175
3/6/96 1030 31 20 49 2.3 22 58 0.3 14 12 320
4/23/96 1030 34 24 60 2 29 67 0.3 15 30 341
5/22/96 1000 24 16 50 2.1 18 65 0.4 15 14 288
6/14/96 1000 37 27 83 2.9 40 110 0.5 19 11 456
7/23/96 1000 37 31 84 1.7 39 81 0.5 25 4 451
8/27/96 1000 35 25 56 1.7 23 43 0.4 25 17 350
9/9/96 1030 34 25 57 1.9 24 41 0.1 22 13 347
10/18/96 0950 34 26 70 2.7 32 80 0.3 17 <3.0 424
11/7/96 1330 33 24 56 5.8 24 62 0.3 25 74 360
12/3/96 1000 33 25 59 3.7 27 67 0.4 21 24 379
1/14/97 1130 32 22 62 3.3 30 84 0.4 18 18 386
2/18/97 1130 37 25 72 2.8 37 100 0.4 15 7 436
3/18/97 1030 35 23 61 2.4 34 93 0.3 15 <3.0 357
4/9/97 1100 34 25 62 2.6 31 75 0.3 15 3 304
4/24/97 0940 26 19 51 2.3 26 57 0.31 17 3.4 307
5/9/97 0900 29 21 63 2.3 28 62 0.37 17 4.8 314
5/23/97 1030 32 23 69 2.2 32 87 0.39 19 8.6 394
6/6/97 1110 36 27 74 2 37 92 0.4 19 4.1 447
6/17/97 1000 35 27 79 2.1 41 90 0.38 18 4 404
7/10/97 0940 35 27 75 1.8 33 78 0.4 21 <3.0 438
7/28/97 1100 34 27 66 1.2 28 59 0.37 24 3.7 403
8/26/97 1100 32 23 51 3.3 23 33 0.37 24 13 342
9/18/97 1000 34 22 53 2.6 25 52 0.32 23 3.5 352
10/30/97 1040 31 22 51 4.3 26 56 0.3 25 27 343
11/12/97 1130 34 24 53 5.3 24 52 0.29 29 44 367
12/17/97 1040 28 20 57 4.9 31 79 0.28 16 35 350
1/21/98 1030 26 18 50 3.8 24 66 0.33 16 36 310
2/26/98 1100 17 9.1 18 2.1 6.5 19 0.17 10 11 140
3/11/98 1100 32 20 42 2.4 19 53 0.27 13 < 10 303
4/15/98 1130 47 31 73 2.3 37 100 0.35 12 < 10 479

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