Cottonwood Lake (Yankton) at Training Dike Beach


The table below shows the most recent sampling information for
toxic algae (Microcystin) and bacteria (E.coli),
Samples are typically collected on Monday and posted on the web site on Thursday or Friday.

Nearest City - Yankton
Cedar County
This Lake is sampled weekly.
Toxic Algae Data updated on:
10/01/2009

Bacteria (E. coli) data updated:
10/01/2009

Level of Microcystin (ppb)
E. coli (# per 100 ml)
0
14
This Lake is NOT on Toxic Algae Health Alert.

Collect sample at the swimming beach at the Training Dike Recreation Area.
Collect sample at the swimming beach at the Training Dike Recreation Area.



On the table below, the level to trigger a toxic algae Health Alert is 20 parts per billion for the toxin Microcystin. Health Alerts stay in effect until the level stays below 20 ppb for two consecutive weeks

In the Bacteria (E.coli) column, a single sample of 235 counts (or higher) per 100 ml is considered a higher risk for illness through ingestion.



Toxic Algae (Microcystin) & Bacteria (E. coli) Data
This table shows all sampling results for toxic algae and bacteria collected in 2009.

Week Starting
Weekly Health
Alert
Level of Microcystin (ppb)
E. coli
(# per 100 ml)
05/04/2009
No
0
0
05/11/2009
No
0
2
05/18/2009
No
0
4
05/25/2009
No
0.86
73
06/01/2009
No
0
4
06/08/2009
No
0
17
06/15/2009
No
0
4
06/22/2009
No
0.46
15
06/29/2009
No
0
0
07/06/2009
No
0
46
07/13/2009
No
0
12
07/20/2009
No
0
10
07/27/2009
No
0
4
08/03/2009
No
0
6
08/10/2009
No
0
0
08/17/2009
No
0.22
0
08/24/2009
No
0.17
0
08/31/2009
No
0
0
09/07/2009
No
0
0
09/14/2009
No
0
0
09/21/2009
No
0
2
09/28/2009
0
14




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