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.
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 4, 2015 |
No |
0 |
4 |
May 11, 2015 |
No |
0 |
67 |
May 18, 2015 |
|
|
10 |
May 25, 2015 |
No |
0 |
6 |
June 1, 2015 |
No |
0 |
0 |
June 8, 2015 |
No |
0 |
4 |
June 15, 2015 |
No |
0 |
178 |
June 22, 2015 |
No |
0 |
38 |
June 29, 2015 |
No |
0.1 |
8 |
July 6, 2015 |
No |
0 |
39 |
July 13, 2015 |
No |
0 |
3 |
July 20, 2015 |
No |
0.1 |
5 |
July 27, 2015 |
No |
0 |
11 |
August 3, 2015 |
No |
0 |
4 |
August 10, 2015 |
No |
0 |
13 |
August 17, 2015 |
No |
0.2 |
0 |
August 24, 2015 |
No |
0.2 |
1 |
August 31, 2015 |
No |
0 |
6 |
September 7, 2015 |
No |
0 |
88 |
September 14, 2015 |
No |
0 |
38 |
September 21, 2015 |
No |
0 |
10 |
September 28, 2015 |
No |
0 |
16 |