Ontario Ministry of Environment URBAN STREAM WATER CONCENTRATIONS document seems to be a real big waste of time considering Washington State is purposely dumping this stuff into the water bodies there.
PESTICIDE APPLICATION NOTICE
Portions of privately owned tidelands in Willapa Bay and Grays Harbor will be treated with the pesticide “Sevin” on or between July 21, 2013 and July 26, 2013.
Notices will be posted at all public boat launches on the water bodies within 1.5 miles of the treated area and posted at all public access within 1/4 mile of the treatment area. The active ingredient to be used is carbaryl. For more information contact the applicators at 360-244-2651, 360-875-5557, 360-942-8616. This treatment is regulated under permits issued by the Department of Ecology Water Quality Program (360-407-0245). This pesticide has been approved for this purpose by the EPA and Washington Departments of Agriculture, Ecology and Fish and Wildlife.
Willapa Bay Grays Harbor Oyster Growers Association
P.O. Box 3, Ocean Park, WA 98640
Published July 3 and July 17 2013
Legal No. 235-13
Changes in Urban Stream Water Pesticide Concentrations One Year after a Cosmetic Pesticides Ban
Aaron Todd 2010