Cottonwood Lake (Yankton) at Training Dike Beach (Sampling Site 10)

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:
10/2/14		 Bacteria (E. coli) data updated:
10/2/14
Level of Microcystin (ppb) E. coli (# per 100 ml)
0 33
Toxic Algae (Microcystin) Information
For more information about toxic algae and its potential health effects.		 Bacteria (E. coli) Information
For more information about bacteria and its potential health effects.
This Lake is NOT on Toxic Algae Health Alert.


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
.
Week Starting Weekly Health Alert Level of Microcystin (ppb) E. coli (# per 100 ml)
May 5, 2014 No 0 1
May 12, 2014 No 0 15
May 19, 2014 No 0.1 13
May 26, 2014 No 0 0
June 2, 2014 No 0.1 63
June 9, 2014 No 0.1 34
June 16, 2014 No 0.1 0
June 23, 2014 No 0.2 62
June 30, 2014 No 0.2 59
July 7, 2014 No 0 47
July 14, 2014 No 0 8
July 21, 2014 No 0 13
July 28, 2014 No 0 10
August 4, 2014 No 0.1 0
August 11, 2014 No 0.1 10
August 18, 2014 No 0.1 2
August 25, 2014 No 0 3
September 1, 2014 No 0 4
September 8, 2014 No 0 13
September 15, 2014 No 0 73
September 22, 2014 No 0 81
September 29, 2014 No 0 33