Holmes Lake at North Shore (Sampling Site 19) |
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 |
117 |
May 11, 2015 |
No |
0 |
1414 |
May 18, 2015 |
No |
0 |
45 |
May 25, 2015 |
No |
0 |
6 |
June 1, 2015 |
No |
0 |
17 |
June 8, 2015 |
No |
0 |
8 |
June 15, 2015 |
No |
0 |
1120 |
June 22, 2015 |
No |
0 |
13 |
June 29, 2015 |
No |
0 |
4 |
July 6, 2015 |
No |
0 |
44 |
July 13, 2015 |
No |
0.34 |
1 |
July 20, 2015 |
No |
0 |
575 |
July 27, 2015 |
No |
0 |
11 |
August 3, 2015 |
No |
0.62 |
93 |
August 10, 2015 |
No |
0 |
649 |
August 17, 2015 |
No |
0.39 |
96 |
August 24, 2015 |
No |
0 |
1 |
August 31, 2015 |
No |
0.77 |
16 |
September 7, 2015 |
No |
0 |
1553 |
September 14, 2015 |
No |
0 |
35 |
September 21, 2015 |
No |
0.41 |
12 |
September 28, 2015 |
No |
0.66 |
14 |