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.

Nearest City - Pierce Pierce County
This Lake is Sampled Weekly.
Toxic Algae Data updated on:
9/25/14
Bacteria (E. coli) data updated:
9/25/14
Level of Microcystin (ppb) E. coli (# per 100 ml)
3.79 3
Toxic Algae (Microcystin) Information
For more information about toxic algae and its potential health effects.
Bacteria (E. coli) Information
For more information about bacteria and its potential health effects.
This Lake is Currently On Toxic Algae Health Alert!


On the table below, the level to trigger a toxic algae Health Alert is20 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 of235 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 5, 2014
May 12, 2014 No 7.17 38
May 19, 2014 No 9.43 10
May 26, 2014 No 11.55 13
June 2, 2014 No 15.47 28
June 9, 2014 No 2.48 72
June 16, 2014 No 7.04 29
June 23, 2014 No 14.35 118
June 30, 2014 No 19.67 326
July 7, 2014 No 10.42 8
July 14, 2014 Yes 21.6 8
July 21, 2014 Yes 18.05 4
July 28, 2014 No 11.97 10
August 4, 2014 Yes 38.5 1
August 11, 2014 Yes 10.22 22
August 18, 2014 No 7.95 2
August 25, 2014 Yes 22.75 1
September 1, 2014 Yes 11.81 8
September 8, 2014 No 6.32 4
September 15, 2014 Yes 24.76 36
September 22, 2014 Yes 3.79 3
September 29, 2014