Harlan Lake at SE Beach (Sampling Site 18) |
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 |
|
|
|
May 10, 2010 |
No |
0.13 |
14 |
May 17, 2010 |
No |
0 |
115 |
May 24, 2010 |
No |
0.48 |
1 |
May 31, 2010 |
No |
0.49 |
2 |
June 7, 2010 |
No |
0.21 |
8 |
June 14, 2010 |
No |
0.11 |
2,419 |
June 21, 2010 |
No |
0.11 |
50 |
June 28, 2010 |
No |
0.35 |
128 |
July 5, 2010 |
No |
.21 |
12 |
July 12, 2010 |
No |
.24 |
11 |
July 19, 2010 |
No |
0.06 |
35 |
July 26, 2010 |
No |
0.07 |
44 |
August 2, 2010 |
No |
0.18 |
13 |
August 9, 2010 |
No |
0.14 |
20 |
August 16, 2010 |
No |
0.14 |
2420 |
August 23, 2010 |
No |
0.05 |
31 |
August 30, 2010 |
No |
0.16 |
17 |
September 6, 2010 |
No |
0.04 |
4 |
September 13, 2010 |
No |
0.08 |
16 |
September 20, 2010 |
No |
0 |
6 |
September 27, 2010 |
|
0.53 |
|