Willow Creek Lake at Swimming Beach (Sampling Site 45) |
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 6, 2013 |
No |
0.04 |
23 |
May 13, 2013 |
No |
0.13 |
30 |
May 20, 2013 |
No |
0.55 |
37 |
May 27, 2013 |
No |
0.28 |
46 |
June 3, 2013 |
No |
0.1 |
25 |
June 10, 2013 |
No |
0.66 |
20 |
June 17, 2013 |
No |
1.22 |
6 |
June 24, 2013 |
No |
2.32 |
12 |
July 1, 2013 |
No |
3.57 |
4 |
July 8, 2013 |
No |
6.6 |
2 |
July 15, 2013 |
No |
2.31 |
1 |
July 22, 2013 |
No |
3.79 |
1 |
July 29, 2013 |
No |
9.85 |
0 |
August 5, 2013 |
No |
3.96 |
3 |
August 12, 2013 |
No |
17.85 |
0 |
August 19, 2013 |
No |
7.7 |
1 |
August 26, 2013 |
No |
8.75 |
0 |
September 2, 2013 |
Yes |
26.39 |
6 |
September 9, 2013 |
Yes |
20.58 |
0 |
September 16, 2013 |
Yes |
>35 |
1 |
September 23, 2013 |
Yes |
>35 |
8 |
September 30, 2013 |
No |
12.18 |
15 |