Variables: concentration Substances: fipronil (ZOCSXAVNDGMNBV-UHFFFAOYSA-N) 2.4-D (OVSKIKFHRZPJSS-UHFFFAOYSA-N) diclofenac (DCOPUUMXTXDBNB-UHFFFAOYSA-N) mecoprop (WNTGYJSOUMFZEP-UHFFFAOYSA-N) terbutryn (IROINLKCQGIITA-UHFFFAOYSA-N) Systems: flow channel experimental hall Keywords: passive sampler Chemcatcher pharmaceutical sewer overflows monitoring pesticide