Cottonwood (Yankton) Lake at South Swimming Beach
Data updated on: 09/29/2005


Seasonal
Geometric Mean
Geometric Mean for
last 5 samples
Single Sample Maximum
2
Compare to 126
1
Compare to 126
200
Compare to 235
Date
E. coli
(# per 100 ml)
Date
E. coli
(# per 100 ml)
05/02/2005
1
07/18/2005
20
05/09/2005
1
07/25/2005
70
05/16/2005
1
08/01/2005
16
05/23/2005
1
08/08/2005
200
05/30/2005
1
08/15/2005
1
06/06/2005
12
08/22/2005
1
06/13/2005
0
08/29/2005
1
06/20/2005
1
09/05/2005
1
06/27/2005
40
09/12/2005
2
07/04/2005
0
09/19/2005
2
07/11/2005
20
09/26/2005
5

Note: Data flagged with * did not meet NDEQ's Quality Assurance Standards


Nebraska Department of Environmental Quality
1200 "N" Street, Suite 400
P.O. Box 98922
Lincoln, Nebraska 68509
(402) 471-2186