Merritt Reservoir at NE Shore (Sampling Site 30)

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 - Valentine Cherry County
This Lake is Sampled Weekly.
Toxic Algae Data updated on:
9/30/10
Bacteria (E. coli) data updated:
9/27/10
Level of Microcystin (ppb) E. coli (# per 100 ml)
12.78 199
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 NOT on Toxic Algae Health Alert.

Merritt Reservoir southwest of Valentine.  Collect sample at swimming beach on NE part of Lake off Highway 9 approximately 23 miles southwest of Valentine. Merritt Reservoir southwest of Valentine.  Collect sample at swimming beach on NE part of Lake off Highway 9 approximately 23 miles southwest of Valentine.


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 0.09 6
May 10, 2010 No 0.11 0
May 17, 2010 No 0 1
May 24, 2010 No 0.07 62
May 31, 2010 No 0.05 26
June 7, 2010 No 0.1 19
June 14, 2010 No 0.1 3
June 21, 2010 No 0.09 3
June 28, 2010 No 0.08 2
July 5, 2010 No .04 1
July 12, 2010 No .39 1
July 19, 2010 No 0.96 10
July 26, 2010 No 2.42 2
August 2, 2010 No 3.69 11
August 9, 2010 Yes 35.0 20
August 16, 2010 Yes 23.73 0
August 23, 2010 Yes 13.68 9
August 30, 2010 No 19.5 1
September 6, 2010 No 11.94 7
September 13, 2010 Yes 29.82 117
September 20, 2010 Yes 7.2 63
September 27, 2010 12.78 199