Scientific Investigations Report 2011-5082
Figure 10. Detected simazine concentrations in the Hood River basin, Oregon, compared to USEPA water-quality standards and toxicity and sublethal endpoints for salmonids and their prey. Acute, 24-hour exposure; chronic, 96-hour exposure; LC50, 50 percent lethal concentration; EC50, 50 percent effective concentration.
First posted June 17, 2011
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