It can only get into water by applying it to a hard surface which then takes rain and washes into drains, anything that goes onto land will be absorbed by any clay particals and the soil bugs deal with it, sorry but applying it pre harvest is how it gets into food,Correct me if I am way out of line here but the problem I see with glyphosate is guys down south that are infested with blackgrass putting 4 or 5 applications a year of 4l/ha glyphosate on the same patch of ground which is bound to get into the water supply etc. We put on 1l/ha pre harvest to speed things on and tidy the land up for the next crop and we are getting the blame.