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

Methylmercury in unfiltered water

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

[ng/L - nanograms per liter]

Date	Time	Methylmercury in unfiltered water (ng/L)
2/7/96	1030
3/6/96	1030	0.217
4/23/96	1030	0.082
5/22/96	1000	0.146
6/14/96	1000	0.134
7/23/96	1000	0.156
8/27/96	1000	0.097
9/9/96	1030	0.037
10/18/96	0950	0.021
11/7/96	1330	0.25
12/3/96	1000	0.248
1/14/97	1130
2/18/97	1130	0.888
3/18/97	1030	0.333
4/9/97	1100	0.278
5/9/97	0900	0.177
6/17/97	1000	0.191
7/28/97	1100	0.098
8/26/97	1100	0.092
9/18/97	1000	0.134
10/30/97	1040	0.299
11/12/97	1130	0.377
12/17/97	1040	0.184
1/21/98	1030	0.256
2/26/98	1100	0.236
3/11/98	1100	0.472
4/15/98	1130	0.218