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 4, 2015 |
No |
0 |
21 |
May 11, 2015 |
No |
0 |
107 |
May 18, 2015 |
No |
0 |
60 |
May 25, 2015 |
No |
0 |
88 |
June 1, 2015 |
No |
0 |
36 |
June 8, 2015 |
No |
1.26 |
35 |
June 15, 2015 |
No |
0 |
12 |
June 22, 2015 |
No |
0 |
66 |
June 29, 2015 |
No |
1.7 |
24 |
July 6, 2015 |
No |
0.77 |
60 |
July 13, 2015 |
No |
13.16 |
19 |
July 20, 2015 |
No |
8.13 |
3 |
July 27, 2015 |
No |
0.93 |
|
August 3, 2015 |
No |
2.8 |
27 |
August 10, 2015 |
No |
0.43 |
3 |
August 17, 2015 |
No |
1.07 |
17 |
August 24, 2015 |
No |
0 |
5 |
August 31, 2015 |
No |
0 |
11 |
September 7, 2015 |
No |
0 |
10 |
September 14, 2015 |
No |
0 |
89 |
September 21, 2015 |
No |
0 |
60 |
September 28, 2015 |
No |
0 |
231 |