Variables: concentration Substances: fipronil (ZOCSXAVNDGMNBV-UHFFFAOYSA-N) terbutryn (IROINLKCQGIITA-UHFFFAOYSA-N) mecoprop (WNTGYJSOUMFZEP-UHFFFAOYSA-N) diclofenac (DCOPUUMXTXDBNB-UHFFFAOYSA-N) Keywords: Chemcatcher pharmaceutical sewer overflows monitoring pesticide