No-spray buffers have been established for some pesticides in some areas of Washington and Oregon. Buffers extend 60 ft by ground and 300 ft by air from affected water bodies. For a list of pesticides and buffer requirement: http://www2.epa.gov/endangered-species/salmon-mapper
The EPA reviews pesticides for their effects on endangered species. The list of affected pesticides can change frequently; therefore, consult the list each time before applying pesticides in affected areas. EPA publishes Endangered Species Protection Bulletins that set forth geographically specific pesticide use limitations for species protection. The pesticide label will direct you to the Bulletins Live! Website (http://www.epa.gov/oppfead1/endanger/bulletins.htm) and you are required to follow the pesticide use limitations. Direct any questions to your state department of agriculture.