Rockford Lake at SW Beach


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:
10/01/2009

Bacteria (E. coli) data updated:
09/16/2009

Level of Microcystin (ppb)
E. coli (# per 100 ml)
15.61
2
This Lake is NOT on Toxic Algae Health Alert.

Rockford Lake at beach located at south edge of dam.
Rockford Lake at beach located at south edge of dam.



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.



Toxic Algae (Microcystin) & Bacteria (E. coli) Data
This table shows all sampling results for toxic algae and bacteria collected in 2009.

Week Starting
Weekly Health
Alert
Level of Microcystin (ppb)
E. coli
(# per 100 ml)
05/04/2009
No
0.29
49
05/11/2009
No
0.28
19
05/18/2009
No
0.13
10
05/25/2009
Yes
20.91
2
06/01/2009
Yes
2.89
4
06/08/2009
No
5.39
2
06/15/2009
No
5.17
1
06/22/2009
No
3.52
4
06/29/2009
No
2.69
10
07/06/2009
No
.53
10
07/13/2009
Yes
33.44
1
07/20/2009
Yes
10.78
1
07/27/2009
Yes
39.27
8
08/03/2009
Yes
4.24
7
08/10/2009
Yes
44.5
2
08/17/2009
Yes
11.55
0
08/24/2009
No
15.51
0
08/31/2009
No
8.14
40
09/07/2009
No
12.98
1
09/14/2009
No
6.49
2
09/21/2009
No
4.47
09/28/2009
15.61




Nebraska Department of Environmental Quality
1200 "N" Street, Suite 400
P.O. Box 98922
Lincoln, Nebraska 68509
(402) 471-2186