NPDES Pesticide General Permit
On November 26, 2006, the USEPA issued an aquatic pesticide rule which states that a Clean Water Act (CWA) permit is not required for the application of pesticides directly to water in order to control pests or for the application of pesticides to control pests that are present over or near water, where a portion of the pesticide will unavoidably be deposited in the water in order to target the pests (i.e., spraying to control non-native plants growing on the water's edge because some of the pesticide would unavoidably enter the water).