Map of Streams Tested for Pesticides in 11 Midwestern States
![Map of Streams Tested for Pesticides in 11 Midwestern States](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/PressReleaseFigureTox_revised07052017e%20%5BConverted%5D_0.png?itok=NW6zueIr)
Detailed Description
At least one pesticide in more than half of the 100 streams sampled in the Midwest exceeded a toxicity threshold predicted to cause harm to aquatic insects and other stream organisms, ranging from acute effects (mortality after short-term exposure) in 12 streams to chronic effects (longer term impairments to reproduction and development) in 41 streams.