Lake Conditions (last updated 8/25/2014)

 

Monroe:

HAB present as of 8/13 (cell count exceeds 100,000 cells/mL); IDEM, IDNR, and other state and county stakeholders have been notified

 

Harden:

HAB present as of 8/4 (cell counts exceed 100,000 cells/mL threshold);  IDEM, IDNR, and other state and county stakeholders have been notified

 

 J. Edward Roush Lake:

HAB present as of 7/23 (cell counts exceed 100,000 cells/mL threshold); cell counts exceed 1,000,000 cells/mL at 1 site; IDEM, IDNR, and other state and county stakeholders have been notified

 

Salamonie Lake:

HAB present as of 8/4 (cell counts exceeds 100,000 cells/mL); cell counts exceed 1,000,000 cells/mL at 8 sites; IDEM, IDNR, and other state and county stakeholders have been notified

 

Brookville Lake:

HAB present as of 8/4 (cell counts exceed 100,000 cells/mL threshold); cell counts exceed 1,000,000 cells/mL at 1 site; IDEM, IDNR, and other state and county stakeholders have been notified

 

Mississinewa Lake:

HAB present as of 8/5 (cell counts exceed 100,000 cells/mL threshold); cell counts exceed 1,000,000 cells/mL at 3 sites; IDEM, IDNR, and other state and county stakeholders have been notified

  

Taylorsville Lake:

HAB present as of 8/1 (cell counts exceed 100,000 cells/mL threshold); cell counts exceed 1,000,000 cells/mL at 2 sites; KDOW, KY Dept of Parks, KY Dept of Fish & Wildlife, and other stakeholders have been notified

  

Rough River Lake:

HAB present as of 7/22 (cell counts exceed 100,000 cells/mL threshold); KDOW, KY Dept of Parks, KY Dept of Fish & Wildlife, and other stakeholders have been notified

  

Barren Lake:

HAB present as of 8/19 (cell counts exceed 100,000 cells/mL threshold); KDOW, KY Dept of Parks, KY Dept of Fish & Wildlife, and other stakeholders have been notified

  

Nolin Reservoir:

HAB present as of 7/21 (cell counts exceed 100,000 cells/mL threshold); KDOW, KY Dept of Parks, KY Dept of Fish & Wildlife, and other stakeholders have been notified

  

Green River Lake:

HAB present as of 8/1 (cell counts exceed 100,000 cells/mL threshold); cell counts over 1,000,000 cells/mL at 4 sites; KDOW, KY Dept of Parks, KY Dept of Fish & Wildlife, and other stakeholders have been notified

 

 

*For general QUESTION-AND-ANSWERS about HABs review this document: General Lake Questions and Answers on Algae Blooms

 

 

 Cyanobacterial cell count Health Risk   Classification
Exceed 20,000 cells/mL  Low probability of adverse health effects  HAB ADVISORY
Exceed 100,000 cells/mL  Moderate probability of adverse health effects  HAB CAUTION

 

{For more information about these standards see "Cyanobacteria Threshold Values" below.}

Cyanobacteria Threshold Values

The Louisville District has adopted cyanobacteria threshold values from the World Health Organization's "Guidelines for Safe Recreational Water Environments" (see Chapter 8 under the link "WHO Guidelines"). These values reflect the minimum level at which the Louisville District will classify a HAB and what actions will be taken. These values are measured as the number of cells of cyanobacteria per milliliter of water (cells/mL). HAB ADVISORY's and CAUTION's are lifted once cell counts decline below the threshold values.

 Cyanobacterial cell count Health Risk   Classification
Exceed 20,000 cells/mL

 Low probability of adverse health effects.

Short-term adverse health outcomes, e.g., skin irritations, gastrointestinal illness.

 HAB ADVISORY
Exceed 100,000 cells/mL

 Moderate probability of adverse health effects.

Potential for long-term illness with some cyanobacterial species.

Short-term adverse health outcomes, e.g., skin irritations, gastrointestinal illness.

 HAB CAUTION

{This table is adapted from the World Health Organization's "Guidelines for Safe Recreational Water Environments" Chapter 8.}

About HABs

What are harmful algal blooms?

Freshwater harmful algal blooms (HABs) are significant and excessive growths of blue-green algae, also known as cyanobacteria. All freshwater lakes inhabit native blue-green algae species that are capable of producing HABs. Several of these species can at times produce toxic chemicals (called cyanotoxins) that are harmful to the nervous system (neurotoxins), the liver (hepatotoxins), and the skin (dermatoxins) of humans and other animals. In addition to cyanotoxins, HABs are very harmful to the lake ecosystem and can cause depletion of oxygen levels which can create large fish kills.

 

What causes HABs to form?

General contributing factors that promote the formation of HABs are:

·        Ample/excessive sunlight

·        Warm temperatures

·        Low-water or low-flow conditions

·        Excessive nutrients (nitrogen and phosphorus)

Although some HABs occur during the cold seasons, they most frequently occur during the summer when temperatures are high, sunlight is ample, and the flow of incoming water is low. Also, one of the most influential factors of HAB growth is the concentration of nutrients such as nitrogen and phosphorus. Nitrogen and phosphorus are both required by blue-green algae to live and are often scarce in the environment, therefore limiting growth. Most nitrogen and phosphorus pollution (also known as nutrient overloading) comes from the runoff of agricultural fertilizer, lawn fertilizer, untreated human sewage (storm overflows), and untreated animal sewage from concentrated animal feeding operations. 

 

More Information and Reporting HABs

For more information about HABs in the Louisville District, go to the following links under "HABs Links" or please contact the Water Quality Team with the Louisville District. The Ohio algae info link has updated information about HABs in Ohio lakes and the Indiana Blue-Green Algae link has updated information about HABs in Indiana lakes.

If you see signs of a potential HAB and want to report it, please contact the Louisville District Water Quality Team by email at louisvillewaterquality@usace.army.mil or call (502) 315-7439 or (502) 315-3217.

To report a HAB in the state of Ohio, go to the Ohio algae info link and fill out the Bloom Report Form.

 

Disclaimer

NOTICE: All data contained herein is preliminary in nature and therefore subject to change. The data is for general information purposes ONLY and SHALL NOT be used in technical applications such as, but not limited to, studies or designs. All critical data should be obtained from and verified by the United States Army Corps of Engineers, Louisville District, Water Quality Team, 600 Dr. Martin Luther King Jr. Place, Louisville, KY 40202. The United States of America assumes no liability for the completeness or accuracy of the data contained herein and any use of such data inconsistent with this disclaimer shall be solely at the risk of the user.

Water Quality

HAB Photos