Iron Horse Trail Lake @ Iron Horse 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 - DuBois
Pawnee County
This Lake is sampled weekly.
Data updated on: 09/27/2007
Level of Microcystin (ppb)
E. coli (# per 100 ml)
0.44
5
This Lake is NOT on Toxic Algae Health Alert.

Bacteria (E. coli) Information
The chart below shows sampling results for bacteria collected in 2007.

Seasonal
Geometric Mean
Geometric Mean for
last 5 samples
Single Sample Maximum
27
Compare to 126
4
Compare to 126
14136
Compare to 235


Toxic Algae (Microcystin) & Bacteria (E. coli) Data
This table shows all sampling results for toxic algae and bacteria collected in 2007.

Week Starting
Weekly Health
Alert
Level of Microcystin (ppb)
E. coli
(# per 100 ml)
05/07/2007
No
0.02
14136
05/14/2007
No
0.04
308
05/21/2007
No
0.05
479
05/28/2007
No
0.05
613
06/04/2007
No
0.03
82
06/11/2007
No
2.30
48
06/18/2007
No
0.42
17
06/25/2007
No
1.9
23
07/02/2007
Yes
130.69
4
07/09/2007
Yes
41.2
3
07/16/2007
Yes
36.4
10
07/23/2007
Yes
3.84
41
07/30/2007
Yes
45.1
12
08/06/2007
Yes
2.33
4
08/13/2007
No
3.8
9
08/20/2007
No
1.87
8
08/27/2007
No
0.27
9
09/03/2007
No
0.49
2
09/10/2007
No
0.17
3
09/17/2007
No
0.65
6
09/24/2007
No
0.44
5
10/01/2007

Note: Data flagged with * did not meet NDEQ's Quality Assurance Standards


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