2013 Toxic Blue-green Algae
and Bacteria Sampling Results


NDEQ conducts weekly or bi-weekly sampling for toxic blue-green algae and bacteria at a number of public recreational lakes across Nebraska from May through September, and these results are updated weekly. Samples are typically collected on Monday and posted on the web site on Thursday or Friday.

Updated Information, Sept. 27, 2013:
NDEQ Expands Bacteria Sampling
Due to the fact that some floodwaters from the South Platte and Platte River are being diverted into a number of Nebraska canals and reservoirs, the Nebraska Department of Environmental Quality has expanded and will be extending its weekly sampling plan for bacteria.
More information and sampling results


At the top of the table below is a list of all
Current Lake(s) on Health Alert for toxic blue-green algae. Lakes that have been placed on Health Alert must subsequently have two consecutive weeks of low readings before the alert is ended. Samples above 20 ppb microcystin are placed on alert.

For more information about health alerts and what to look for, go to
Precautions and Facts Regarding Toxic Algae at Nebraska Lakes.

For more information about the history of toxic algae sampling in Nebraska, go to
Cyanobacteria: The Nebraska Experience

The next category, High E. Coli Bacteria Readings, lists lakes that showed unusually high readings of bacteria in the most recent sampling, which can also be a health concern. Samples above 235 counts/ 100 ml water are considered high.

Click here for more information about bacteria and its potential health effects.

The last category, Other Lakes Sampled, lists the results for lakes which are not under Health Alert for toxic algae, and their most recent sample results for bacteria are considered low.

Click on any lake name on the table below to view a chart of that lake’s sample results for toxic algae (Microcystins) and E.coli bacteria for the 2013 recreational season

Lake NameLake # -- County- Last Updated - Microcystin (ppb) - E.coli Bacteria
Show details for Current Lake(s) on Health AlertCurrent Lake(s) on Health Alert
Show details for High E.coli Bacteria LevelsHigh E.coli Bacteria Levels
Show details for Other Lakes SampledOther Lakes Sampled


The map below shows the locations of the lakes referred to in the table above



The links below will take you to the sampling results taken during the recreational seasons ( May through September) for 2012, 2011, 2010, 2009, 2008 and 2007.

Updated information regarding 2013 toxic blue-green algae and bacteria sampling will be posted on the page staring May 9, 2012

2012 Bacteria and Toxic Algae Monitoring: Weekly Results

2011 Bacteria and Toxic Algae Monitoring: Weekly Results

2010 Bacteria and Toxic Algae Monitoring: Weekly Results

2009 Bacteria and Toxic Algae Monitoring: Weekly Results

2008 Bacteria and Toxic Algae Monitoring: Weekly Results

2007 Bacteria and Toxic Algae Monitoring: Weekly Results



Nebraska Department of Environmental Quality
1200 "N" Street, Suite 400
PO Pox 98922
Lincoln, Nebraska 68509
(402) 471-2186