Toxic Streams

A Global study of pesticides in streams and waterways states that such pollution is rare, but when found, it exceeds regulatory limits about half the time. Of the 2,500 aquatic sites covered in the study, just 2.6 per cent of the samples contained measurable levels of insecticides. At the sites containing insecticides, 52.4 per cent of the detections exceeded regulatory thresholds. In fact, the high levels of pesticide contamination constituted an excessive threat to aquatic biodiversity.

Source

Down To Earth, May, 2015