Blue-Green Algae

OLYMPUS DIGITAL CAMERAProlonged dry conditions can cause problems; one of these is blue-green algae, which can overgrow in a stagnant pond. Aerating a pond can prevent blue-green algae, but if this is not possible the pond should be fenced off from livestock and avoided by humans and companion animals.


Examining a water sample under a microscope can only do confirmation of blue-green algae. However, you may note an earthy or musty smell, see surface scums of green, yellow or blue-green and the water may contain blue-green algae.


These tips will help keep your ‪family safe from ‪blue-green ‪‎algae:

• Never swim in a ‪‎lake during a blue-green algal bloom.

• Keep ‪pets out of blue-green algae.

• Never drink or cook with lake ‪‎water (green or not) because pathogens and contaminants may be present and boiling will not remove them.


If you have home and garden questions, please contact a UConn Extension office or call our Home and Garden Education Center at 877-486-6271.



EDEN – Extension Disaster Education Network

Penn State Drought and Livestock Health

Alabama Extension Water Resources