- Author: Jeannette E. Warnert
Published on: February 9, 2010
Researchers who studied runoff from agriculture, sewage treatment plants and urban neighborhoods found that the main source of pesticide concentration was from urban run-off, according to an article published in the Daily Californian. Portions of the American River and San Joaquin River contain pesticide levels high enough to kill some invertebrates, such as gadflies and mayflies.
"On the source side of things, urban run-off consistently has pyrethroids at levels that are toxic to some organisms," the story quoted Donald Weston, a UC Berkeley biology professor and co-author of the study. The study was published in the journal
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