Johnson Lake at SE Beach (Sampling Site 20) |
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 3, 2010 |
No |
0.07 |
1 |
May 10, 2010 |
No |
0.12 |
4 |
May 17, 2010 |
No |
0 |
2 |
May 24, 2010 |
No |
0.11 |
10 |
May 31, 2010 |
No |
0.03 |
31 |
June 7, 2010 |
No |
0.1 |
65 |
June 14, 2010 |
No |
0 |
128 |
June 21, 2010 |
No |
0.1 |
29 |
June 28, 2010 |
Yes |
21.37 |
1 |
July 5, 2010 |
Yes |
14.21 |
21 |
July 12, 2010 |
No |
7.77 |
75 |
July 19, 2010 |
No |
2.07 |
5 |
July 26, 2010 |
No |
2.36 |
1 |
August 2, 2010 |
No |
1.35 |
2 |
August 9, 2010 |
No |
1.89 |
2 |
August 16, 2010 |
No |
0.56 |
1 |
August 23, 2010 |
No |
0.13 |
1 |
August 30, 2010 |
No |
0.4 |
12 |
September 6, 2010 |
No |
0.51 |
47 |
September 13, 2010 |
No |
0.22 |
13 |
September 20, 2010 |
No |
0 |
6 |
September 27, 2010 |
|
0.14 |
15 |