No one is unexposed to pesticides. We are exposed to pesticides in six ways:
Millions of kilograms of active ingredients of pesticide volatilize off site ever year. Pesticides have been measured 40 km away from sprayed sites. Pesticides evaporate off sprayed surfaces for many days or months at an average of 5-20 % of active ingredients, and up to 80-100 %. The estimated evaporative drift in Saskatchewan would therefore be in the order of 500,000 to 2,000,000 kg/year for herbicides only. Pesticide from a sprayed lawn can be detected 15 meters away. Anyone living in an urban area in Saskatchewan breathes air with measurable quantities of 15-19 herbicides in late spring.
Pesticides have been detected in rain in Saskatchewan. They are present in all our surface waters including all farm dugouts and sloughs tested, very often at levels above aquatic life guidelines. They also contaminate glacier meltwater and groundwater.
25% of randomly sampled Canadian produce bears traces of pesticides, 1.2% at illegal levels. Pesticides have also been found in mothers' milk.
Lawn herbicides are tracked indoors where they can remain in carpets for over one year. Pesticides were found in dust from all the homes in a North carolina study and in all farm homes in Iowa. Such testing has not been done in SK, but the results should be similar. Pesticides have been found in blown dust and dirt in Saskatchewan.