You may have noticed the green slick of seemingly toxic green algae or some other plant bloom on the Schuylkill River this week. Is this just the latest evidence of industrial and agricultural runoff creating the toxic conditions for algae blooms? Is this affecting the quality or drinking water?
Apparently not. Philadelphia magazine discussed a similar green bloom in early August.
Apparently this is duckweed, and prose is minimal threat to our drinking water. It does certainly reflect the dry Summer we have had, as well as the unusual weather patterns that favor duckweed taking over.
Intuitively, I can't imagine this reflects a good, healthy state of the river now.