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 Verona, 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)
2/22/96	1020	0.141
3/19/96	1010	0.155
4/4/96	1020	0.111
5/14/96	1140	0.043
6/11/96	1130	0.07
7/18/96	1240	0.052
8/15/96	1230	0.057
9/26/96	1200	0.006
10/7/96	1300	0.053
11/13/96	1030	0.282
12/18/96	1100	0.669
1/28/97	1230	0.112
2/13/97	1310	1.977
3/12/97	1400	0.199
4/29/97	1400	0.451
5/14/97	1340	0.324
6/4/97	1130	0.135
7/17/97	1100	0.048
8/13/97	1250	0.066
9/24/97	1100	0.123
10/29/97	1100	0.078
11/25/97	1230	0.100
12/16/97	1230	0.156
1/28/98	1230	0.130
2/24/98	1130	0.165
3/25/98	1300	0.158
4/22/98	1230	0.121