Two Rivers SRA Lake No. 4 at Beach (Sampling Site 41) |
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 2, 2011 |
No |
0 |
1 |
May 9, 2011 |
No |
0.02 |
4 |
May 16, 2011 |
No |
0 |
15 |
May 23, 2011 |
No |
0 |
23 |
May 30, 2011 |
No |
0.01 |
88 |
June 6, 2011 |
No |
0 |
21 |
June 13, 2011 |
No |
0.09 |
13 |
June 20, 2011 |
No |
0.04 |
54 |
June 27, 2011 |
No |
0.02 |
411 |
July 4, 2011 |
No |
0.00 |
40 |
July 11, 2011 |
No |
0.09 |
51 |
July 18, 2011 |
No |
0.54 |
27 |
July 25, 2011 |
No |
0.19 |
4 |
August 1, 2011 |
No |
0 |
21 |
August 8, 2011 |
No |
0 |
9 |
August 15, 2011 |
No |
0 |
12 |
August 22, 2011 |
No |
0.20 |
59 |
August 29, 2011 |
No |
0.08 |
3 |
September 5, 2011 |
No |
0.16 |
23 |
September 12, 2011 |
No |
0.25 |
9 |
September 19, 2011 |
No |
0.56 |
5 |
September 26, 2011 |
No |
0.03 |
10 |