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)

Quality Control
Replicate Data: Surface Water

Methylmercury in unfiltered water

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

[nanogram/L - nanogram per liter]

Site Identification	Date	Time	Methylmercury Environmental Sample Concentration (ng/L)	Replicate Methylmercury Concentration (ng/L)
Sacramento River at Verona, CA	2/22/96	1020	0.141	0.124
Colusa Basin Drain at Road 99E near Knights Landing, CA	3/6/96	1030	0.217	0.201
Colusa Basin Drain at Road 99E near Knights Landing, CA	4/23/96	1030	0.082	0.078
Sacramento Slough near Knights Landing, CA	5/23/96	1030	0.057	0.068
Sacramento River at Colusa, CA	6/17/96	1100	0.093	0.049
Sacramento River at Freeport, CA	7/17/96	1100	0.012	0.060
Colusa Basin Drain at Road 99E near Knights Landing, CA	8/27/96	1000	0.097	0.089
Sacramento River at Verona, CA	9/26/96	1200	0.006	0.040
Colusa Basin Drain at Road 99E near Knights Landing, CA	10/18/96	0950	0.021	0.007
Sacramento River at Verona, CA	12/18/96	1100	0.669	0.116
Sacramento River at Verona, CA	3/12/97	1400	0.199	0.290
Sacramento Slough near Knights Landing, CA	4/29/97	1040	0.498	0.267
Sacramento River at Verona, CA	5/14/97	1340	0.324	0.509
Colusa Basin Drain at Road 99E near Knights Landing, CA	6/17/97	1000	0.191	0.193
Sacramento River at Freeport, CA	7/14/97	1230	0.062	0.073
Sacramento River at Colusa, CA	8/18/97	1120	0.102	0.090
Sacramento River at Freeport, CA	9/23/97	1030	0.103	0.087
Sacramento Slough near Knights Landing, CA	10/29/97	1000	0.178	0.191
Sacramento River at Freeport, CA	11/20/97	1130	0.160	0.113
Colusa Basin Drain at Road 99E near Knights Landing, CA	12/17/97	1040	0.184	0.208
Colusa Basin Drain at Road 99E near Knights Landing, CA	1/21/98	1030	0.256	0.260
Sacramento River at Colusa, CA	2/11/98	1300	0.080	0.039
Sacramento River at Verona, CA	3/25/98	1300	0.158	0.154
Colusa Basin Drain at Road 99E near Knights Landing, CA	4/15/98	1130	0.218	0.358

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)

Quality Control Replicate Data: Surface Water

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)

Quality Control
Replicate Data: Surface Water