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 3, 2010 |
No |
0.37 |
4 |
May 10, 2010 |
No |
0.34 |
7 |
May 17, 2010 |
No |
0.13 |
2 |
May 24, 2010 |
No |
0.06 |
55 |
May 31, 2010 |
No |
0.22 |
548 |
June 7, 2010 |
No |
0.43 |
84 |
June 14, 2010 |
No |
1.04 |
117 |
June 21, 2010 |
No |
0.09 |
866 |
June 28, 2010 |
No |
0.31 |
9 |
July 5, 2010 |
No |
.16 |
40 |
July 12, 2010 |
No |
.25 |
56 |
July 19, 2010 |
No |
0.29 |
52 |
July 26, 2010 |
No |
1.37 |
10 |
August 2, 2010 |
No |
2.47 |
30 |
August 9, 2010 |
No |
0.43 |
4 |
August 16, 2010 |
No |
0.45 |
19 |
August 23, 2010 |
No |
0.93 |
84 |
August 30, 2010 |
No |
1.86 |
0 |
September 6, 2010 |
No |
1.44 |
15 |
September 13, 2010 |
No |
2.28 |
11 |
September 20, 2010 |
No |
1.05 |
10 |
September 27, 2010 |
|
0.98 |
19 |