blue-green algae toxicity
Thank you for contacting eXtension. There best information on this topic locally will come from the Department of Natural Resources. The link below is a good overview: http://dnr.maryland.gov/waters/bay/Pages/algal_blooms/Algae-Bloom-FAQ.aspx
Thank you. I've read the text at the link as well as a couple of the PDFs found there.
I was interested as the question arose on a birding listserve as to whether b-g algae could be found in water set out for birds at levels that might prove a problem. A proposed solution was to treat the water sources with Clorox, but the FAQ text mentions no control methods.
Find the listserve posts at:
We have no expertise about this. Blue-green algae commonly occurs in ponds or the Bay.
In a birdbath, we'd recommend cleaning periodically and filling with fresh water.