I'm going through the core curriculum and I got most of the drills from the W/S/E module wrong. it's crazy.
I feel very comfortable with the theory and strategy for this question type but when it comes to drilling, I miss so many of them! What is happening?
Something the explanation forgets to mention but I believe is key is the fact that government testing statedly regulates drugs being 'put onto the market'. Yet the public concerns arise from chemicals being dumped, not sold commercially. Thus, drugs could still pass the test and nonetheless be harmful when spilled on water sources.