The Challenge
There are seven aquatic herbicides approved for use under the Aquatic Plant and Algae Management (APAM) permit which may have the potential to harm fish. This project will help provide information on what concentrations of the most commonly used aquatic herbicide products containing these seven active ingredients could be used while posing minimal risk to sensitive fish species and aquatic invertebrates.
Our Solution
Spheros performed acute and chronic Whole Effluent Toxicity (WET) testing, using standard EPA methods, which will allow Ecology to assess the toxicity of these pesticides within the scope of their intended use and maximum application rate allowed by the product label. The Standard EPA methods for WET testing for acute Rainbow trout (Oncorhynchus mykiss), chronic Fathead Minnow (pimephales promelas), and Daphnid (Ceriodaphnia dubia) with acute dual endpoints. Spheros (LRE Water) contributed chemistry consulting for each of the products tested to insure that products were tested appropriately.
Prime
Results +What makes this unique
The WET testing results will allow Ecology to assess the toxicity of these pesticides within the scope of their intended use and maximum application rate allowed by the product label. This information will help Ecology determine safe dose concentrations and make changes to the permit if necessary.
Project Experts
