Variables: concentration Keywords: pharmaceutical sewer overflows monitoring pesticide Substances: 1.3-benzothiazole-2-sulfonate (ZCXGMSGCBDSEOY-UHFFFAOYSA-N) 2.4-D (OVSKIKFHRZPJSS-UHFFFAOYSA-N) benzotriazole (QRUDEWIWKLJBPS-UHFFFAOYSA-N) mecoprop (WNTGYJSOUMFZEP-UHFFFAOYSA-N) terbutryn (IROINLKCQGIITA-UHFFFAOYSA-N)