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: 10/1/15	Bacteria (E. coli) data updated: 10/1/15
Level of Microcystin (ppb)	E. coli (# per 100 ml)
18.42	210
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 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	26
May 11, 2015	No	2.51	15
May 18, 2015	No	2.67	45
May 25, 2015	No	1.91	131
June 1, 2015	No	1.07	15
June 8, 2015	No	3.81	66
June 15, 2015	No	12.83	195
June 22, 2015	No	18.13	25
June 29, 2015	No	3.56	33
July 6, 2015	No	2.31	3
July 13, 2015	No	4.74	6
July 20, 2015	No	6.97	14
July 27, 2015	No	6.65	3
August 3, 2015	Yes	35	8
August 10, 2015	Yes	21.21	4
August 17, 2015	Yes	>35	4
August 24, 2015	Yes	>35	3
August 31, 2015	Yes	26.88	11
September 7, 2015	Yes	>35	0
September 14, 2015	Yes	29.05	3
September 21, 2015	Yes	31.22	61
September 28, 2015	Yes	18.42	210