Rockford Lake at SW Beach (Sampling Site 36)

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 - Holmesville Gage County
This Lake is Sampled Weekly.
Toxic Algae Data updated on:
9/29/16		 Bacteria (E. coli) data updated:
9/29/16
Level of Microcystin (ppb) E. coli (# per 100 ml)
10.57 2
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 2, 2016 No 0 108
May 9, 2016 No 0.20 57
May 16, 2016 No 0 36
May 23, 2016 No 0 20
May 30, 2016 No 0 12
June 6, 2016 No 0.38 75
June 13, 2016 No 0 4
June 20, 2016 No 3.59 2
June 27, 2016 No 16.73 130
July 4, 2016 No 2.2 112
July 11, 2016 No 3.19 3
July 18, 2016 No 1.61 7
July 25, 2016 No 2.3 0
August 1, 2016 No 3.81 4
August 8, 2016 No 9.87 2
August 15, 2016 No 18.06 0
August 22, 2016 No 7.56 0
August 29, 2016 Yes >35 0
September 5, 2016 No 9.59 0
September 12, 2016 No 11.06 10
September 19, 2016 Yes 24.43 0
September 26, 2016 Yes 10.57 2